Well I have been to places where others dont go often and people have not been exposed to anything but their own regional/local culture and have had no education - and been treated very well.

Nor do i think a sudden exposure to different ways instigates this behaviour.

I think people come here with their cultural habits and thats how they behave.

Cultural habits which are accepted in their point of origin are not acceptable to others.

I think a good analogy would be a brit going out for a few pints. Thats his culture and he will practice it upon arrival in a new land.
Some will stare and spit..because for them it is ok for them.
I will wear my hair uncovered because it is ok for me. etc No doubt some of my cultural habits upset others too.
ie humour such as satire.