I can’t really think of a reason for that as Reddit is hated somewhat equally by “both” sides of the spectrum. It’s just something I find interesting.
Is it? Just look at the comments here - the thought is about political left and right and yet almost everybody is talking about conservatives, that’s a sure sign of Americans.
Plus I bet a good portion of the extreme left here are Americans disillusioned with their government, swinging hard into the other extreme.