Cultural dominance ruining diversity?

As different cultures interact with and influence each other, they become less distinguishable from each other than before, but they each become more diverse within. So I would say that globalization actually increases diversity. I don't understand what you mean by "value of diversity" though.

For stereotypical example of what I mean, in the past you might've been able to eat a hamburger in America or sushi in Japan. Now you can eat both sushi and a hamburger in either America or Japan.

I disagree. Because this change, although not forced-upon people, some people will intake this as a cultural-shock, and will rebel against it. I think this also encourages terrorism. To explain in detail:

 Spoiler

Imagine you're a person that lives in Egypt. Why should you, have McDonalds in Egypt? As a person that was born in Egypt, you might feel inferior and dominated by another culture, and you have no power to stop it. You want your culture to stay the way it is, so that it can be unique. Why should there be a McDonald's? Sure, there may be other people that resides in Egypt that are okay with McDonald's there. But some people are not okay with that. They might feel that their own culture is superior, or .. they are shocked by change, and won't want it. They'll resent America.

This is even explained in books. I'll try to find quotes if I can. I read a couple in the past weeks or so.