This is terribly inaccurate - we have to remember to step outside our tech bubble and understand that in-person interactions are drastically different than comments on facebook or the web. I can despise people's views and like them individually.
You can have friends in other countries and still happily go to war against those barbarians/heretics/whatever-your-justification-is, and keep telling yourself that you are doing it just as much for them as for yourself, even if they might currently disagree.