As I recall it, he slightly qualified his remarks, but for illustrative purposes, let me paraphrase his qualification to illustrate the original problem:
"Some of the police are, I assume, good people."
Actually, this one one of the times when Trump may have stretched for a Level 3 lie of framing the context. Assuming that all but a few of the police are bad people is certainly a kind of frame.
Most of the time Trump is lying at Level 0 of self contradiction or Level 1 of counterfactual statements. My problem is I hate liars. Yeah, I know that no one is perfect or capable of telling the complete truth all of the time. Some liars are more equal than others. Reminds me how some imperfections, like sexual assault, are more imperfect that others...
Obviously I hope the Donald goes down, and hard, but the enthusiasm gap is hard to assess. Also, this is an unprecedented election in so many ways that it wouldn't be surprising if the polls are off.