An unfortunate and prolonged myth is that liberals aren’t armed, please don’t be misled. Liberals, unlike some of their useful idiots, have no intent to obey the rules they set for others.
Remember, Diane Feinstein ... an ultra-Liberal in the Liberal LaLaLand of San Francisco ... was issued a carry permit where nobody .... I mean NOBODY ... else is allowed to obtain one.
Was there a specific threat against her?
No ... she was present when Harvey Milk was shot, and she wanted to be able to defend herself if such a situation arose again.