My sister and BIL have worked very hard their whole lives and have done very well. You would expect them to be conservatives. I just don’t get it but I will not shut up for family or anyone else. I believe what I believe.
I see this occasionally and chock it up to being dropped too many times when they were babies.....:-)
Seriously, both my parents and my wife's parents were flaming lefties, they all did reasonably well, particularly mine. We often struggled against them in their culture of politics, particularly during the Reagan years when we started our own business and became conservative. It got worse through the years. I would counsel you to try to keep the peace if you can, but do let them know you won't stop posting the truth on Facebook. They should know better than to ask you that.