Got any evidence of that? IIRC, agricultural fields have been correlated with autism, but I am not aware of any specifically tying it to petrochemicals.
If someone calls you a Nazi and you lean into it, you're a white supremacist bag of shit. Not a Nazi, mind, but just a racist piece of shit. And likewise, if you defend doing it as "just a troll, to own the libz".
A private citizen should be allowed make whatever gesture they want. And I am free to point out that makes him a racist shitbag, along with his defenders. Like you.
He, however, is no longer acting soley as a private citizen, so it is much worse. Go ahead and defend that now. He also voiced support for AfD. You know, the German far-right party. The one that is the spiritual successor to the actual Nazis. I'm sure you'll argue that was just a troll and hes really a swell guy, right?
If letting your kids watch a footie match makes them hate people, you're doing it wrong. And by "it", I mean parenting.