It's not about being a threat to society; it's about QB Dog Killer being a despicable human being
I'd have no problem with this if you said all four shouldn't be in the NFL. But to say that murdering dogs is a greater crime than putting large crowds of humans at risk is absolutely ludicrous.
The sad truth is that animal torture shocks and revolts us more than human torture because movies, media, etc. have desensitized us to human torture.