Contrast that with the real world where (outside of some fringe goofballs) having deeply different political beliefs doesn't mean that much. You can vehemently disagree with one another... while also enjoying each other's company (and also talking about things other than politics!).
It's all just tribal bs -- mostly via imprinting -- very few people actually care about genuine principles or have nuanced takes on issues.
You have many allies, but they are doing more productive things than arguing with senseless people on social media :)
Be very careful criticizing socialism, for instance, or the mods (one in particular) will accuse you of starting "flame wars".
Of course any debate that isn't related to their personal politics or against their worldview is fine.
Case in point: https://news.ycombinator.com/item?id=20830862
Note that criticizing capitalism endlessly is just fine. Defending it? Not so much.