Uhh, nothing I guess. You need two fish for friendship (nevermind that bettas are too aggressive for that). With a fish and a mirror you only have one fish.
For friendship you need someone who doesn't talk like that.
Once you have been exposed to this kind of paranoid thinking, there is no way of building relationships of any kind anymore. It is like a spiritual death.
What is the bubble? The world of friends and healthy relationships, or the cold shitty place with cultural wars and divides everywhere?
If you bring someone to the shitty place, you better have the guts to acknowledge that that person will never, ever see friendship anywhere.
Wow, you see absolutes everywhere. Exposed once, spiritual death. World of friends, world of wars--pick one. It's all more complex than that.
Some relationships are easy because nobody is trying to sabotage them, others are hard because somebody is, others are hard for entirely different reasons. It's the middle case that I'm concerned with here. I agree that it's a pretty awful thing to harm a friendship by injecting it with unnecessary culture war bullshit but my claim is that in most cases it's neither of the friends who want that outcome, it's some remote third party who has decided to interfere. Sure it's a failing of one friend or the other if they take the bait, but they have not spiritually killed the other by doing so.