This is not an appropriate article or discussion for HN. There's lots of other places to "be political". Not so many to "be technical"... It would be a great disappointment to see HN turn into, say, Slashdot.
They got polarized on Facebook. Because you wanted them to. Because it keeps them coming back and your stock goes up.
If you're a Facebook employee - congrats! This is what you've created. A radicalized cesspool of idiots to increase your bottom line.