OKay, that's a more reasonable explanation. Just be clear though, this is a racially charged question because you're asking about a racially charged issue.
People feel whiteness is under attack because the economy is bad, particularly in rural areas. People like Donald Trump will then tell them that things are bad because there's bad crime in the streets and scary illegal immigrants and other things. But basically that the weak people (minorities who do not have much power) are to blame for all the problems in the world. Not hte people with the power and money - the CEOs and bankers and so forth. So no, minorities are not predisposed to violence, but people are being told racist lies about them to give them someone to blame for heir problems.