Eh, that's fair. Though, contrary to what the left thinks, nationalism by itself isn't a bad thing. It's just that the Nazis did it in the worst way possible, making a lot of people think nationalism is inherently evil. Ironically much like how a lot of liberals think communism was sullied by the USSR.
That said, if you point at Hitler and say you're evil because you agree with him on one thing, you should say the same to vegans and animal activists. No joke, the dude could've been a member of PETA or the WWF in another life.