Seems pretty obvious you haven’t actually interacted with an average leftist, let me tell you, because that is not true…
No, it most certainly is true. The left has decided that it's acceptable and encouraged to stoop to the level of their enemies. You probably disagree with this because it's a hard truth you don't want to acknowledge; don't worry, I see it all the time.
There’s a difference between allowing right-wing policy and opening the door to fascism. Should poison be allowed to run for main course?
Now that's an actual discussion to be had. I, personally, think representative democracies need to go the way of the dodo and we should move to direct voting. I try not to reason about a broken system that is rotten to the core. It's a waste of time and an effective distraction from what we should be doing instead.
Maybe god allows evil to exist because to take it away would be to directly interfere with our free will.
That's your opinion.