>don't have experience with culture outside of their own and their local/national mainstream news.

Isn't this true of most Americans democrat or otherwise.

Basically yes. I think the internet has changed things quite a bit but many are still isolated

Rural communities need broadband internet access and we need to work to reduce the amount and impact of echo chambers on the internet

For most Americans, exposure to outside cultures will happen much more through reading about them or interacting with, say, foreign exchange students and foreign cultural social groups, than visiting the places. Americans who grow up with the money to travel abroad a lot often come from general wealth, which also lets them afford to spend more time doing things like grad school. This affects the liberal causes well-traveled American liberals might support; they may care less about economic fairness than gender/racial equality for instance.

We had a subject called "Social Studies" in school which introduced us to other cultures of the world. I thought every country had something similar.

This is just the opinion of some fool on the internet, but I personally think that interacting with people from other cultures is far more important than just reading about them. Not saying I disagree with you, I definitely had social studies in school in the US but that didn't impact me nearly as much as interacting with other fellow fools on the internet. We can learn a lot more about each others perspectives and cultures by interacting.

I completely agree. I live in Canada, and run a weekly Zoom call on startups etc. We have quite a few members from India, Latin America and elsewhere and I find it useful to get their perspectives. I even have callers from China (you need to change the Zoom data center config to permit this). These are people that I met on WeChat groups (unfortunately not a realistic option outside China for most right now), and some former students. We try to stay away from politics, but interestingly there is a wide range of points of view from Chinese callers.

Agreed. Though the things I learnt in social studies like history, geography, and civics helped me in finding a common ground with people of other cultures. Given my introverted nature I imagine I would have had a much harder time if I did not have this foundation.