"feelings yakuza" is an internet slang term referring to "those who turn their personal discomfort into a social evil and try to erase the target completely". It has been used in proship/antiship discourse.
Typically, Americans will harass Japanese artists for being proship or pedophiles for what they draw. It's a concept that may be difficult to understand in Japan, where all fictional depictions are allowed, it's not good to insult someone's work, and people are looked down upon for not being able to distinguish between fiction and reality.
when your inner feelings for someone are so dangerous and may cause chaos that you keep it hidden and hurt yourself (please dont keep your feelings hidden no matter how bad they are)
Some people believe that all people are soft and sweet and gooey inside but people are really bastard coated bastards with bastard fillings. - Doctor Cox