That some speak positively about him is a reflection of how depraved society has become. 
The guy was extremely twisted and sick. 
Doesn’t matter one bit what his father did. 
Lenny drank tranny piss and lived in a squalor difficult to even imagine. 
Homosexuality is mental illness, as is, but even so, it doesn’t give an individual license to conduct himself in such a repugnant way. 
No matter the urges, a person has a responsibility to decency to not cross a reasonable line. 
This sewage human was a blight to the planet.