The only way to break these people out of their echo chambers is to enact anti-cult tactics. Trying to get someone out of a cult is an extremely hard thing to do. When it's 30% of a country's citizens, however, it may be impossible. If Capitol Police testimony, video evidence, and other MAGA members speaking out couldn't break the spell, what will insulting them and their beliefs prove?
I don't have the solutions to fix this and I loathe the MAGA cult, but the harder you insult, point out hypocrisy, and humiliate these supporters, the deeper into the cult they retreat. This is seen time and time again with friends and family who attempt to help someone escape an obvious cult or religion.
I am 100% in the "punch a Nazi in the face" crowd, but what we need to do is treat these people like they have been brainwashed, rather than them making the conscious decision to support fascist rhetoric. To them, in their cult, we are the outsider trying to prosecute their leader and destroy their beliefs and way of life.
You will never out-debate them in their beliefs. You will never insult them into leaving. And treating them all like the enemy is exactly what their leaders are telling them you will think.
I'm not saying every MAGA member is possible of redemption, but the most success we may find, to remove this fascist rot is with those who were deep in and have found their way out. The call to leave needs to come from "inside the house," so to speak.