On the internet, I express my opinions more forcefully than I do in real life. It's rare to find a real person who discusses politics with an open mind, willing to really listen to a differing opinion, and wanting to learn about the "other side". People have grabbed on to their candidate, and they feel so strongly that their candidate can do no wrong, has never done wrong, and will never do wrong. I've asked friends and family to explain to me the weakness and strength of their candidate, and they always always can only tell me about the strengths. Every candidate has weaknesses, but people are in denial or ashamed to just too stubborn to admit it.
That's why I don't talk politics in real life, except for the very rare time I find someone who can have an intellectual discussion without their emotions ruining the whole thing.