Brexit is the biggest single political divisive thing in my lifetime, it was Tory ideology that brought it to attention. The insults go in both directions on this one.
Regarding uneducated, I'll repeat again, there is a clear correlation between education in a constituency and that constituency voting remain. In the past I have provided the publicly available datasets necessary to correlate, and asked anyone to disprove it....still waiting. That isn't to say that every brexit voter is uneducated, or that every remainer is educated, but the correlation exists and really isn't surprising.
I haven't seen the term scummy used personally, on either side.
I've never seen people wishing physical harm, but happy for you to highlight it. If you mean people wishing that job losses and financial issues happen to brexiteers first, that again is simply about taking accountability and responsibility for your decisions in life.