Robust studies show monogamy among heterosexual couples is around 25%, maybe lower. The notion that marriage means monogamy for life is as fictional as the notion that one must be married to have children.
As for the stats on crime, even if true, whats your point? That people should be deprived of rights others enjoy if their demographic group commit crimes more often? If so, you must be ready to deprive young men of the right to own guns, because they are responsible for the overwhelming proportion of gun crimes.
But of course you aren't. You didn't even have the cojones to make your argument explicit. Argument by inuendo, weak.