Stay around friends whenever possible. Fascists are at the end of the day cowards, and he might not feel as powerful with a gun if he's outnumbered. Other people have suggested arming yourself, but that's a worst case scenario. I guess as long as you're only around him in public he will hopefully be too scared to do anything. As others said, unless he explicitly threatens you, it's not likely that staff or police will interfere.

God this is such an awful situation. I can't believe I'm sitting here typing up some advice about how to not get killed by a fascist like it's nothing. Stay strong comrade

Probably unpopular opinion: Tell the cops anyway.

This sounds like a death threat. If you get killed, people will be like "wHy DiDn'T sHe TeLl ThE pOlIcE????".

Worst case, the police don't care and they think that the boogaloo boy is cool. Best case, they do something about it and maybe keep you from dying. I don't think that the police will actually do anything, but they might, and this is life or death, so it's worth trying.

If you tell the police and they don't do anything, you'll have a good story about how useless the police are.

Everyone else's advice still applies, but you can still tell the police about this.

While self defence ect. Is absolutely worth considering, you ideally don't want it to get to that stage.

From the sounds of it, your university is doing the standard beurocratic arse covering bullshit of hoping it'll all go away. That's because dealing with the problem is going to be a pain in the arse for them.

One thing, as well as the other suggestions here of course, to try is making yourself a bigger pain in the arse to them than dealing with the problem will be. Document and report everything. Keep on complaining until they are in the position where if (god forbid) the worst would happen there'd be massive a pile of reports about him and they would definately lose their jobs. Then they might step in.

Trust your instincts, don't let them make you feel stupid and document/report everything.