Earlier quoted context omitted.
Have you considered that perhaps the increasing levels of vitriol and outright hatred directed at him by the left might have had something to do with his rightward trend? They seem pretty correlated. I struggle to see how doubling down on the hatred is going to convince anyone other than _already hateful_ people of the righteousness of your cause?
Have you considered that doing a nazi salute, whether earnest or ironically earnest, is just not okay?
But you (and everyone else in this thread, with perhaps a few exceptions) hated him long before the salute, so to try to blame it on that is pretty disingenuous.
I think trying to justify your hatred of someone based on something the did after you started hating them is pretty "not okay", too, fwiw