Thing is, though. I dont mind friends of different opinions at all, I think its interesting. Yet my circle of friends, especially the Dutch ones, are almost collectively all roughly in the same political corner anyway. I once spent some time thinking about this, mapping it kinda (what do I think who votes?), and guesstimated that about half of my friends & acquaintances in Holland voted for the same party as I do, the Green Left - even though it gets just 6% in the national elections. Imagine! Plus, almost all of the other half would have voted Socialist or Labour or at most Democrat. I've had two acquaintances, the past ten years, who voted right-wing liberal, and you know ... I knew that they did, it was exceptional. Nuff said.
So how does that work? I dunno. I honestly dont think I sort them out that way, which is kinda confirmed by how, among the friends I made in
other countries, the scope of opinion has been much wider. I think its more to do with the self-selection of social circles. In students' houses at least you still get a random mix of people: there was a very active member of the local Christian students' association and a girl who I think later became the first female rabbi (lost touch). But otherwise, you know: at university I studied history, faculty of Arts; I did my internships at the university, one at a research centre on ethnic relations; my first proper job was at a migrant NGO; I did volunteer work at film festivals, in a theatre-cafe where they had experimental/alternative concerts too; the people you meet at all of those places are generally by definition going to all be in roughly the same political corner. Sometimes I think it comes more as a cultural marker, part of one's self-identification in terms of (sub)cultural niche, than as a deliberate consideration of views or anything.
The effect is all the clearer here because of the multi-party system; not just are most all people in those places left-wing, but most of them specifically gravitate toward the party thats associated, you know, with students, the young unemployed, the artistic/cultural folks, the conscious, nuanced NGO crowd: the Green Left. The Socialist Party simply attracted a different kind of crowd, at least five or ten years ago (now many of my friends are drifting over to it after all).
Definitely all kind of scary. Found that abroad I was more likely to meet people outside the niche I just naturally moved in at home. One of the first proper friends I made abroad was both piously Catholic and hardline, unreformed Eastern-Bloc communist

. Then there was the girl I mentioned above. Its cool, better that way. But I'm also aware that the whole Green Left-ish-type scene at home is part of a cultural stratum of sorts, which just feels naturally like
home the way nothing here does. Got to do with having common frames of references, common experiences or memories or associations with images or words -- its kind of sickly but sometimes, when I find that as soon as you go into detail nothing you say here is self-evidently grasped or understood the way you meant it, I do miss it.