I think part of the problem is that certain factions tend to be, as a whole, antithetical to open minded good faith engagement. The other part is that if you express a view too close to the views of one of those factions then people (reasonably) take shortcuts and use mental heuristics to determine that you’re not worth engaging with. The result is that it’s difficult to find common ground, especially on the internet where some (many) people are truly not acting in good faith.