Exactly.... He was antigun while in office. He sat with antigun Senate and House Democrats live on mainstream media networks and bashed the NRA while calling for more gun control. He supported the bumpstock ban, Red Flag laws, capacity limits, and putting an end to private sales and gifting firearms to friends and family nationwide. He said to he'll with the Constitution and due process when he opened Pandora's box by telling the ATF to bypass Congress, and when he told the world that law enforcement and government should "take our guns" without going through the judicial system.
With that said and back on topic, please explain why we're calling a man who is sticking to his principles by refusing to vote for an antigunner an "idiot?" Why are people more mad at Riddenhouse for refusing to vote for an antigunner who doesn't care about violating multiple constitutionally protected rights than they're mad at Trump. If Trump didn't do wrong, Rittenhouse wouldn't have any reason NOT to support and vote for him.
It's akin to your wife breaking her promise and marriage vows by having an affair, you asking for a divorce, and then your friends, family, and the Judge overseeing your divorce case are are bashing and ridiculing you for breaking up your family instead of your wife.