Haha, yes, but most people obviously have had a lot of positive experiences with the majority community as well. In Stockholm (and here I am obviously exaggerating and generalizing quite a lot) most Muslim immigrants live in what are basically poor ghettos surrounding the city. These areas have nothing that would make anyone from the city ever go there. Since many are either old, young or unemployed not that many come into the city either. So, those you do see tend to very disproportionately be gangs of young men coming into town to have fun. And running into gangs of young men is often a negative experience.
So what you're saying is that most people don't have many positive experiences of Muslim 'immigrants' because mostly they don't have any actual experiences of them as anything other than 'people who are not like us'. Which isn't so far off Xahar's argument,
really.