I'd argue that, yes, there can be a valid counterargument against everything you mention. The only dangerous trend here is pretending that there are undeniable consensus. Especially if they were forged in the last 0.5-0.05% of the lifespan of humanity.

Also nobody is critizing Ukraine from defending itself. We're critizing Reddit and redditors in general for being hypocrites. Never in history were "people of color denied from existing without harassment", etc. What does people of color even mean? Doesn't that group comprise the vast majority of human beings?

You've swallowed an entire package of propaganda and, more importantly, implying that that's The Truth (tm) and that it cannot be argued with. That's why I think people like you are our biggest pressing problem.