Are you comparing Trump to people who fought for freedom, equality and civil rights? Those people were arrested because of an unjust system. Trump was tried for corruption and assault. This is a false comparison.
I'm quite sure that the majority of USA voters believes that Trump fights for freedom, equality and civili rights, and that charges against Trump are as unjust as were charges against MLK.
The "actual truth" of the matter does not matter today -- the perception is truly that he is a god-like hero, come to save the masses from the oppression of the elite.