They're of the same mind but different people.
Leftism has become a cult. If you want to mix with them you have to spout matching views about pretty much everything. I know people like this, sadly some are extended family. You just don't argue with them, or they call you a tory or nazi. Leave them alone in their weird corner of the universe.
Sadly most people treat them like this, they don't hear anyone arguing with them so they think everyone agrees. They don't, they just can't be arsed to argue with them.
Free thinking is not tolerated.