So helping someone who is being attacked and supporting them is “joining the war”?

Pacifism doesn’t mean you cannot defend yourself or surrender against an attacker.

And that’s the whole point here: Ukraine isn’t waging a war, they’re defending against an invasion.

Do I smell Vodka there?

Well, if they all banded together, went to the streets and protested together - what bad could happen?

Arresting everyone? Hundreds, even thousands of people? How big should that prison be?