There's an expression in my native language which, directly translated, is something along these lines:

"If my grandma had a rotor, she'd be a helicopter". I think it perfectly encapsulates your "slippery slope" argument, that if today we accept that saying you want to rape someone on Twitter is hate that needs to be stopped, tomorrow saying that processed foods are bad will be hate as well. Do you even realise how stupid your argument sounds? We're not talking about criticism. Were Nazis "criticizing" Jews? Do racists "criticize" other "races"? No, they hate them, and there is a pretty heavy difference between the two.