They don't like it when you ask them to back up their tales or define their terms. That just shows that you "don't get it".
I don't discuss politics with my family -- 100% Moonbat, I'm afraid.
People on the left have a simple moral/ethical code: "Whatever I can get away with"
How can we expect anyone who is totally divorced from daily reality )and when faced with negative consequences never fails to blame someone else) to have a sense of ethics. The truth is a very demanding master and it ALWAYS makes them squirm because it disturbs their sense of the world the way it "should" be. They are not capable of facing reality. Ever.
I work with a bunch of leftys. Today a group of us went to lunch at an Italian restaurant. Two of the other three are vegetarians. The restaurant was not serving eggplant because of the exorbitant price of eggplant coming from Mexico. There was a huge outcry at the table when the waiter explained this to them. The waiter then said that they have had to increase the prices of salads because of the lettuce shortage and then he said something about tomatoes, but I didn't catch it. (Can you imagine not being able to get tomatoes at an Italian restaurant? Horrors!)
Anyway, one of them turned to me and said, "Oh my God, you said this was going to happen about two months ago! I remember you telling me!"
I just smiled and shrugged. I was busy purchasing some silver Eagles through my smartphone.