It's unhealthy in a political sense to never listen to counter evidence or people who disagree with you. You can ignore crazy people like Republican politicians, but you should listen to people with reasoned arguments. If only to better understand why you disagree with them, it's a good thing to get different perspectives. Try it sometime.
Sure, you can get that from reading blogs, articles, books, etc. Doesn't mean you need to live with people with different views.
Right, it's awkward to talk to your neighbors about politics anyway. And, as someone who lives in a 99% Obama precinct, I probably see more diverse types of people anyway. There is something to living in NYC, riding the subway and rubbing elbows with business execs and filthy homeless people to open up your worldview.
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