That was one of my arguments after I got in to an argument with a good friend. Lets look at the consequences:

• erosion of cultural identity
• discrimination against natives population or at least whites in general, this includes our children
• polarized society
• increased violence
• not one place where increased diversity made people happier or was a net positive to the social structure or happiness

pros:

• it may be better economical
• you are going to be considered marginally less racist, you are still a pos for being white

If money is the only reason then you are just selling out.

My second argument is what would you do if suddenly a bunch of immigrants moved in your rich, white, neighborhood?