Actually, Western Societies do have communities, if anything, they have too many communities, that's the problem, there's Black communities, Christian communities, Muslim communities, the list goes on eternally. The difference is the situation they are forced to live in with regards to their daily lives. In a city, where population density is higher, those communities are forced to interact on a daily basis, and so, over time, a level of understanding is reached, stereotypes are replaced with actual knowledge.
Take the video listed above. Those people aren't chanting because they hate Muslims, they are chanting because they hate the stereotype of Muslims, that they are 'obsessed with Sharia law' (which involves a great deal more than "Stone the women and Infidels!" attitude it's portrayed as) and that they don't believe in human rights. This is taken to the point where, despite the fact the meeting is about Womens' Rights, these people choose to shout the self-same rhetoric in complete ignorance of the purpose of the meeting. The problem is, a lot of these people aren't the sort who would choose to learn more with an open mind, and the situation in less densely populated areas is such that nobody has to, they can sit back and rely on stereotypes.