I may be completely wrong, but I would assume you have way more friends that think like you than not in real life.
I feel your comment is more based on what you see on posts online, which is not actually real people or who they are in their day to day lives.
I'm not a liberal, but if liberal means not supporting Trump (which it seems to for the vast majority of the Chat) then I would not fit in your take on "Liberals" and their sense of humor. Most of my friends think I have a pretty good one.
My best friend from grad school is a Democrat (at least he almost always votes that way) but non registered because he doesn't feel the need to align with a party. One of the funniest people I've ever known.
A friend of mine who is a pastor, and is a registered Democrat, is also one of the best dry humor guys I've ever known. When he interviewed with a church board for his first pastorate, a lady introduced herself as the church treasurer. She said she felt that it was a gift and the Lord had called her to do it. He responded, "So did Judas." I asked him did she or anyone act offended. He said "No, they all laughed. It's all in the delivery."
I will say this to you about my conservative friends and family. For years, and no matter who the POTUS was, we would laugh at SNL portrayals of the President. My family, hardcore conservatives, loved Hartman's Reagan, Carvey's Bush, Hartman and Hammond's Clinton, Ferrell's GWB and Pharoah's Obama. But they don't laugh any more because you can't make fun of Trump. That's a no, no.
Doesn't mean they aren't funny people in their personal lives. They all have good senses of humor and I still enjoy my conversations with them