You can evolve political views but it usually rarely happens, more like in six decades than in six years. You can't evolve or lose basic human empathy though. You either have it or not.
Did he ever renounce his own views? Because publicly spouting Nazi propaganda isn't the kind of thing he can pretend never happened by just waiting a few years. I'm all for leniency, but he needs to show that he's changed. Especially when he has said things like:
- WW2 Germany was "peaceful" and that the war was "forced" upon them
- Churchill and Roosevelt "should have been the first to be prosecuted in the Nuremberg trials"
- The German AfD party is "(mis)labeled" by the mainstream media as Nazis
I'll go a step further and point out that someone who is not only willing to parrot these views but has a fairly detailed rationale for why they believe them are so devoted to those views that I'd find a disavowal of them somewhat suspicious.
Fortunately, it's also pretty clear from other contextual clues that he sees no reason to disavow those beliefs.
On the topic that Nazis are bad and that the Holocaust happened? Yes.
For all his whinging and whining about "muh dresden bombings", he conveniently seems to "forget" that all that stopped one of the worst genocides in history, including planned genocides (such as those of the Slavic people). And then when he does bring up the Holocaust later it's in a way that seems an awful lot like Holocaust denial.
I'm a simple guy. Goose-steps like a Nazi and salutes like a Nazi? Probably a Nazi.