Stupid thing is that it’s the humanity and empathy of the left that is both the draw and the weakness of the movement.
Conservatives can come into leftist discourse spaces and either pose as the extreme leftists you describe, or even just the more reasonable end of the conservatives (non facist/maga types, rare as they are any more) an they’ll be engaged with in good faith. Since they’re ultimately not there for a proper discussion though it results in nothing more than creating chaos and arguments
Liberal/leftists who walk into conservative spaces are greeted with scorn and derision, treated as lunatics from the start not worth listening to. Since the left would generally be coming in with honest intent though at best they waste their time shouting into an established echo chamber, or worse get convinced that there’s a good middle ground to work towards.
I’d need some examples to get what you mean here. My experiences, both personal and simply observed, is that you can you can roughly split both conservatives and liberals into two sub-groups, although the distinction on the liberal side is a lot more fuzzy.
There’s the emotive/moralizing side that fight based on what they feel rather than any concrete justification. What’s right is decided simply by an assumption of how the world should work, either collaboratively or selfishly looking out for yourself only.
Then there are the logical logical arguments. On the conservative side these end up being a lot more in the form of ‘I am right, you need to prove otherwise’ while liberals (myself guilty of it as well) will go through these elaborate deliberations backing one point with another and somehow hoping to convince these people who have already decided they’re right of their error.
If you’ve ever tried beating your head into a brick wall you might recognize the feeling that last one, but it’s hardly an obstruction to dialogue, just a frustration of trying to engage rationally with largely irrational beings.