It’s kind of impressive how many wrong things you just said.
First, it is valid to disregard someone’s opinions based on their other political views. If you had a swastika in your username, should I ignore that and listen earnestly to everything you say? Of course not.
Second, this is about fascism because the quoted text in OP is fascist propaganda. What they’re describing is the idea of the ubermensch, of certain people being inherently superior and genetically predisposed to rule over others.
Third, you’re not a mind reader. You’re incorrectly assuming that you know my thought process. I did not think, “This person has an Israeli flag, therefore they must be wrong,” I thought, “This person is telling people to look for a point in what is very clearly fascist propaganda, hey, look at that, they also have a fascist flag in their username, I guess it makes sense that they’d do that.”
So no, I didn’t write off your opinion because of your support of a fascist regime, though if I had it would’ve been valid. I simply thought critically about two different behaviors you did and noticed that they both display sympathy towards fascism, which I found interesting.