Lemmy is a way bigger echo chamber, it's as "no matter who vote blue" as it gets tbh (with very few exceptions).
Where people aren’t pushed away for respectfully voicing their opinion. Is Lemmy the answer?
Nope, it's the opposite if anything.
I'm constantly getting attacked with ad hominem (my favourite one - getting called a fascist) here despite voicing opinions as respectfully as it gets, as well as providing sources for my claims whenever people ask.
Gotta have really thick skin if you are not left-leaning, but if you are - you will feel right at home :)