Tim Robbins is a gifted actor who’s been in some great films that I’ll always enjoy. “The Shawshank Redemption.” “The Hudsucker Proxy.”

But his advocacy for Bernie Sanders entered some really unhinged territory today, promoting the idea that Hillary Clinton is somehow stealing the election by taking advantage of — or actually engaging in — voter fraud.

Hey NYTimes, CNN. Are you saying that 2+2=5? Are you really OK supporting a candidate with these numbers?#VoterFraud pic.twitter.com/LrxqLTaKbC

— Tim Robbins (@TimRobbins1) April 25, 2016

Anyone who’s followed US politics for any time at all knows that exit polls are notoriously inaccurate, on par with online polls. In other words, virtually meaningless, and certainly not valid “evidence” of voter fraud. I mean, come on now.

He’s also promoting the ridiculous idea that the Correct the Record PAC, formed to push back against anti-Hillary smears circulating on social media, is a diabolical conspiracy to harass and attack Bernie’s supporters. And he’s not the only Bernie supporter going ballistic over this; last weekend I was accused by several Sanders supporters on Twitter of being paid by the Clinton campaign.

It’s pretty depressing to see so-called liberals and progressives doing the right wing’s job for them, and sounding almost exactly like the much crazier loons at Breitbart “News.” I really don’t like to see people like Robbins, whose work I’ve admired and who seems like a pretty good person normally, be manipulated by deceptive right wing propaganda.

He’s been blocking critics on Twitter, but if I could say anything to him it would be: “Don’t squander your credibility like this. Take a step back and stop letting your emotions drive you to do and say things you’ll regret.”

Because if this internecine Democratic conflict leads to a Donald Trump or a Ted Cruz presidency, there will be plenty to regret.

Now please excuse me while I count up all that sweet sweet Clinton payoff cash. cough