The trans community has the same amount of "collective responsibility" for the criminal element in their ranks as the Italian-American community has for the crimes of John Gotti (to use your example), the Jewish community has for the crimes of Bernie Madoff, or I have for the crimes of some pasty white WASP criminal.
IE, none whatsoever.
It's not the responsibility of citizen vigilantes to enforce the law, it's the responsibility of the criminal justice system. Sometimes they do a satisfactory job, sometimes not...but there are very good reasons why that responsibility is not in the hands of average citizens. Anyone who gets disturbed by the thought of censorship, "cancel culture", 1984 Big Brother dystopias etc. should be quite troubled by the idea of having an army of plainclothes para-law enforcement people out there narcing on their fellow citizens getting an abortion or having a child who questions their own "gender identity" or possessing a firearm that state-level authorities don't like or whatever else...