Clearly you must be new to the Internet.

It's just harassment, which apparently can be both criminal and civil depending on jurisdictions.

Not that she should, she should simply have expected it.
It should never have been a surprise to her.

Someone who can perform a bit of self-reflection can understand their behaviour.
I don't expect feminist zealots to be able to.

It's not ok, but it can happen. Better be safe than sorry.

Who said anything about acceptable?
They're understandable.

I'm pretty sure it's a civil one, then again, IANAL.

Who are you to judge someone else's lifestyle choices or sexual orientations?
Those games are perfectly legal.

Legality has little to do with it.
If you push people, it is expected that they will act, regardless of the law preventing certain actions.

You'd be foolish to provoke people.

We can disagree on that topic.
Angry people do not think rationally.

She's free to sue those people.

The pieces of work she characterizes as "vile" are life-defining to some people.
Surely you see where the insult lies.

Huh. I'm male, and I didn't feel insulted.

That's cool, but that's irrelevant. You're not everyone.

A lot of people would view this as an insult. Youtube is not exactly the sort of place where people do a lot of introspection and self-reflection before posting.

It's unreasonable to expect people on the Internet to act civiziled.