On his radio show Thursday, Glenn Beck unloaded on what he described as the "grotesque" politicization of the anti-Iran deal rally on Capitol Hill Wednesday. Two of the people involved he specifically ripped: "clown" Sarah Palin and "third grader" Donald Trump.

Stressing the dire nature of the threat posed by Islamic extremists and the chaos in the Middle East, Beck blasted those who came to event to score cheap political points. Referencing a question by CNN's Don Lemon about Palin's remarks, Beck said he didn't care what she said anymore and was now "embarrassed" to have once supported the former Alaska governor.

I don't care what Sarah Palin says anymore. Sarah Palin has become a clown. I'm embarrassed that I was once for Sarah Palin. Honestly. I'm embarrassed. ... I don't know who she is anymore. I don't know what she stands for. ... She doesn't know what I stand for. We had a falling out long ago because she listened to people who were lying to her about me. Fine. I don't care. I don't care.

Beck also turned his sights on Trump, who he has made clear in the past he does not endorse. Vaguely referencing an interaction with Trump's people at the event, Beck said Trump acts like a "third grader" and expects him to "kiss the ring," meanwhile the "world is on fire":

Same thing with Donald Trump. You won't believe what happened with his people and my people yesterday. And I'm thinking, "You're having this conversation while people are dying and we're talking about a deal that will vaporize millions of people? Really? We’re having this petty conversation?" ... I'm telling you, dealing with Donald Trump is like dealing with a third grader. And I'm not dealing with a third grader anymore because the world is on fire. You want to come on the show, great. You don't want to come on the show, great. I don’t really care. … Enough of the third grade politics. Grow up, Donald Trump. Grow up.

UPDATE: Following his on-air comments, Beck posted on GlennBeck.com an apology for and contextualization of his comments about Palin. He also went into more depth about his strong distrust of Trump. A few excerpts:

We all have bad days and bad moments.

Today was one of mine.

I stand by all of my comments on Sarah Palin EXCEPT when I called her a clown. It was unkind, childish and wrong of me to name-call.

What I should have said is this: I don’t know what she really believes. I don’t think she is who I thought she was and haven’t for some time.

When I saw her interview Donald Trump on her TV show I was stunned. Not that she interviewed him, but that she agreed with him and backs him.

I have seen her speak many times about many topics and I just don’t understand her. But I am sure she doesn’t agree or understand me often as well.

I haven’t had a relationship with Sarah since about the time of the shooting of Gabby Giffords. Nothing to do with that at all, but it was around that time that she withdrew from me and my team and it was because, as Todd told me on the phone, “we have been told who our real friends are.” I was stunned. I had backed her hard in every way I knew how. At that time I really believed in her and in fact I really believed she had the ability to change the world for the better.

While I have reached out since, we have not spoken in an any meaningful way since.

I don’t know what they were told or by whom, but I can guess, as it most likely was the same person that tried to drive a stake through my relationship with Mark Levin and Sean Hannity and did for several years.

Thank God, I finally reached out to them, because I had been “told” things about them and they were the same lies that they were told about me.

[...]

I have not reached out to Sarah for quite some time as I do not believe there is a repairable relationship, but I also have never said anything publicly or privately about her that I would regret until today.

She is not a clown. Obviously.

This, however, is the only thing I regret saying.

I do not understand her position and love of Trump. He is clearly a progressive, not a small government constitutionalist.

He was for the bailouts, he is for the idea that the government can just take private land from someone and give it to someone else because they will pay more taxes. Shameful.

There are so many warning signs, policy wise, that the size of the list is frankly shocking. But he is also a bully, sexist, cruel, an ego-manic and narcissist in ways that make Barack Obama seem like Saint Francis.

[...]

So how did I get from disagreement to “clown?”

My – unrighteous – anger came from her speech at the Iran rally.

I am at a point that I cannot see past the dying children at the hands of ISIS, and I truly believe that we are at a point of no return with God if we don’t act now to stand for His principles.

I heard her speech after Donald’s speech – his WAS a clown show – and I couldn’t believe that this is how we are dealing with this issue. This was wrong of me.

[...]

Saying what you mean and meaning what you say is a rough road to walk if you want to have lots of friends in powerful places. Especially if you are as weak in the restraint in the tongue as I am.

It may mean that I don’t have a single listener left in the end, but I would rather be true to myself, principles and to my God than to parties, cliques or popularity. But I never want to lose anyone because I said something cruel or untrue.

I am okay with losing friends or popularity over the truth. What I am not okay with is spouting off in anger or frustration and being a poor example to my children.

That is where I owe Sarah Palin an apology. I was unkind and inaccurate.

It is really ironic, I am the one looking for and preaching unity.

I just held an event called restoring unity. But unity on principles. We don’t all have to agree, but we do have to recognize the time and answer to a higher call.

In some cases it may even mean we lose an election. But I think it is high time we lose elections for what we believe and stand for. Not because we backed horses or policies that made us think we could win.

Video via RWW.