Sorry, but you're basically saying it's legitimate to destroy infrastructure based on what people believe (that others are inferior), not what they do. This is pure ideology policing. Who decides when dating preferences "convulge with" beliefs about inferiority? Many people think certain political ideologies inherently view others as inferior. Communists think capitalists view workers as inferior. Capitalists think communists view individualists as inferior. Religious people think atheists view believers as inferior. Bitcoin maximalists think shitcoiners as inferior. All of these groups "organize against other people". Does any of this justify hacking their infrastructure? These websites weren't organizing attacks. They weren't planning violence (I really haven't seen any evidence). They were expressing abhorrent opinions in their own corner.

A dating site, strictly limited in its capacity, is simply people choosing who to date based on their own personal criteria. You say you support that. It doesnt appear that you do. Here's a question you might want to answer: what's wrong with thinking others are inferior? When one asks this question, automatically it is assumed that they are sympathetic or defending those ideas, so I feel the need to point out that I am not doing that, I genuinely hold no love for white supremacy or any racial supremacy. But its a valid question to explore. What exactly is wrong with someone thinking they're better than others based on some immutable criteria? I can see how acting violently towards others is, but just thinking they're better, choosing who they associate with etc, what do you think is morally wrong with that?