Many here have taken their comments from Trump's playbook:  each time Trump has been accused of something, he immediately diverts it to:  "But look at Hillary and all her crimes."

It's the same as children, when accused of something by a parent, replies:  
"But look at what my sister (or brother) has done that is so much worse."  Never facing the accusation or even admitting it, but tossing bombs on the other person.  Might as well return to the common Christian defense:  "But it wasn't me, the devil made me do it."  No personal responsibility for one's actions at all.
Typical juvenile behavior.  Responsible adults will take responsibility for their own behaviors and let others do the same.