I lean more to the right now than I ever used to do, even though none of my major core thoughts or beliefs have changed much over that time period, I was pretty; centrist.
What has changed though is the increased combative nature of the left wing that I've noticed, things such as challenging everything with wild accusations against you instead of debate, and deplatforming people if they don't agree with them rather than debating is rampant now, made ever so easier with the increase in social media platforms. You're either labelled a racist, or a sexist, or a homophobe, or a transphobe or whatever else lovely term they can come up with, rather than just someone who just has a maybe slightly different viewpoint or opinion than themselves.
The point about neither side existing in a vaccum is correct, you keep pushing from one side, and sooner or later the other side is going to push back, and that can't come as a surprise. If you keep calling somebody stupid, or a group of people stupid for doing something or thinking something differently to you, there is only so long before there's a breakdown, talking down and berating somebody, rarely leads to them being on your side.
And yes, I can acknowledge that people on the right will talk down and berate people on the left aswell, as said, neither side exists in a vacuum, no-one is blameless, everyone is to blame.