In the wake of rising1 hate crimes after Brexit and fears of a similar rise after the election of Trump as President of the USA: How can martial arts help support people who are victim of said crimes?
Note that this question only focuses on verbal attacks such as racial slurs, sexual explicit comments, and sexual harassment. Physical assault (unarmed or armed with either mêlée weapons or firearms) is out. Of course, the earlier can easily escalate into the latter: losing one's cool is a sure way of escalating this. If it is not yet a fight, how can martial arts help?
As a side note: Checking out with LEO where you live is a good thing. If you are planning on owning and carrying a lethal weapon, please consult a criminal lawyer first. It might save you jail time.