People who specifically want to marry Americans are usually those who think that marriage will get them automatic citizenship, and they may well expect to move to America. That doesn't work, by the way.

I know there have been some changes in the law, but I think that if you become an Portuguese citizen you will lose your US citizenship. The only way you can have dual nationality is if it is yours by right of birth.

I know of lots of countries with racism problems. Look at Malaysia, which offers all sorts of scholarships and other advantages only to Malays, though that's a religious issue, too. And England doesn't do that well either. I don't see a lot of black presence in the cabinet there, for instance. Some countries have few problems just because the minority population is small. You can't really judge until you have spent some time there, and worked there.