Then why is it that the states that went for trump almost all have higher gun violence rates than blue states? 

I'll tell you why - guns  aren't being used by trained gun owners with a respect for life and guns, they are being used by gangs, criminals, with no respect for life, only the damage guns can do. Most of the time there was no two parent homes, just dysfunctional homes. No respect for education, just for what brutal activity can get them. No dad or other man in their lives mentoring them, so they turn to gangs for identity and validation. No one to help them find a purpose greater than themselves to strive for.

Funny that if these people in Chicago could use bombs and knives that they, you know, don't. They go with guns.