Things that people say that alert you of them being fascist?
Literally any mention of some supposed 'western civilization' or 'western culture'. Like just say the 14 words already, cause we all know that's what you believe in. Fucking coward
"Overpopulation" or any mention of not having enough resources is some ass-backward Malthusian mindset that usually indicates someone wants to do a culling of undesirables.
If I hear that kind of take I always go "Yeah exactly billionaires use so many more resources than a normal person that they're not sustainable and they have to go". Strangely, so far nobody has agreed
Any time someone talks about how China or India has more pollution than the US, like to tell them that there are more people in those countries, so per-capita the pollution is much lower. And the majority of that pollution is produced by factories that make goods that are sold in the US. So it's pretty much our pollution, we just outsourced it.
And China is rapidly reducing shit even with their larger population. While the US is still tip-toeing around even talking about proposing doing anything at some point down the line (of course such time is only "correct" after 99% of both parties get permission by their corporate masters).
"There isn't enough room for more people here" when they live in a country that has over 38,000 golf courses and the average private suburban property is several times larger than the house that's built on it.