He is hardly making up accusations.   The man and his group admitted being at a bar until it closed at 2am  They were walking, not driving, so tell us:  what are the odds that they had been drinking?    When investigating altercations, police always take a dim view if a person involved in a dispute is drunk.  

It is a fact that if one is out on the streets in the middle of the night, the odds of something bad happening to you go way up.  The bars have closed, and there are other drunk people out in public.  And he is correct that we have only heard one side of this story.  

If you think that it is moral to go out and drink in a bar all night, then you have quite an unusual view of morality.   Moral and decent people do not engage in such behavior.  They are at home in bed at 2am.  Some religions even ban the drinking of alcohol.  It was even outlawed in our nation for a couple of decades, it was considered to be such a terrible evil.