Because he isn’t a lap-dog; doesn’t tow the line for the republican party. An independent conservative who’ll speak his mind.
His stance on the Second Amendment is pretty far from conservative, and it’s a pretty major issue.
I will also add that, when my brother was a cop, his cruiser always had an M-16, an MP-5, a Benelli M-1 Super 80 and whatever Glocks he had on his person. While there are rare occassions that it happens, it’s rare that a cop with 2 fully automatic weapons is “out gunned”.