I won't comment, as all I know is an internet personna.
The problem with his arguments is that he has repeatedly presented a proletariat ethic, in that actions aren't moral/immoral, while also calling others (like Trump) immoral and deserving of judgment. His "ends justify the means" morality lacks substance unless he can give a reason that his end goal is morally superior to anyone else's.
For instance, his end goal is the establishment of socialism, and certain actions (like lying or verbally assaulting others) in order to further that cause are acceptable. But when Trump does the same things to fight the establishment of socialism, he's evil. Luther claims that Trump is evil for lying and verbally assaulting others. He claims he's evil for all manner of things. But he's not actually claiming that Trump is evil for having done those things. Luther has defended and would defend those things in his heroes of the revolution.
No. Trump is evil for being an enemy to the revolution. Period. Luther tries to doctor it up in all manner of ways to hide his root ethic, but he's let slip his Machiavellian ethic too many times.
The problem with his ethic (the ends justify the means), in tandem with his completey relative morality (no means is actually any better than any other) is that every time he defends his heroes, he's defending Trump because Trump's means are just as justified by his ends.