So you admit to being both ethnocentric and intolerant?
Are you saying that there's a necessary cultural homogeny within a given ethnicity? I have some textbooks I could share with you on the subject, but it can best be summed up as "That is a fallacious assumption"
Now, as to intolerant, we'd have to lay down the framework in which "intolerance" can be appropriately applied, so as to avoid the problem of saying that anyone who disapproves of anything is necessarily intolerant
The question is
How long do you want this conversation to be.