Most of the general population is incensed about most things, most of the time. I've stopped caring. Why don't you?

I would love to stop caring. It is indeed a wonderful suggestion.

However, many of those people who would be offended by such things, also get offended by many, much less offensive things, things which often may cause a loss of liberty to others... And they vote.

Does your worrying about and discussing what other people believe contribute more to changing the outcome of their voting, or to other things, like personal payoff of social interaction while having the discussions about people of lower status according to this metric? Overestimating importance of personally discussing politics for policy formation is a classical mistake.

See also: Dunbar's Function

"Though it's a side issue, what's even more... interesting.... is the way that our brains simply haven't updated to their diminished power in a super-Dunbarian world. We just go on debating politics, feverishly applying our valuable brain time to finding better ways to run the world, with just the same fervent intensity that would be appropriate if we were in a small tribe where we could persuade people to change things."