You're assuming I frame my political beliefs in terms of US political parties. I do not. You should bear in mind that according to the average European (which I am) your entire political discourse is nuts. It's not even a question of left or right. So no, the fact that I think one of your parties is more crazy than another of your parties does not mean I am centre left. The most right wing party in my country is to the left of the US democratic party, crazy as that may sound to American ears. The fact that politics in the US have been becoming more and more extreme over the years does not in any way mean that my country is now more left-wing, either.

Frankly, I don't care about left vs. right. I just want people to be able to discuss individual issues based on actual argumentation without turning it into a shouting match. I want to be able to ask what if anything we should do about climate change, without people claiming that I am showing colour politics because my being "in favour" of climate change means I am clearly left wing, or something like that.

if you can find anything to agree with the Democrats about you're not very far left either

For what value of “anything”? It can't be the literal one, as I'd guess that Obama and Stalin both agree(d) that 2 + 2 = 4.