Trump has made, and continues to make, comments that can fairly be read to justify or even celebrate violence so long as it supports him.
I've been saying this for the better part of two decades on VN: the demographics of the country are changing and people feel threatened by it. The phenomenon of Trump and his rabid supporters is a manifestation of that and the country just had to endure it. True conservatives, if they want to have a viable political party and path forward after this, need to stop using race and ethnicity as a proxy for "be afraid of the poor."
GOP support of people like Trump are their own worst enemy in the long term.