@ Antisocial One- I think living in the future at the expense of the present might very well prevent a future from happening... it's ALWAYS the present everywhere and we're stuck living in it, so why not try and make the present more tolerable
That might sound like a mindless sheep attitude to you, but I'm looking out for myself here and I don't particularly care to live in a society where I might be selected as undesirable someday and culled- plus, I LIKE learning from people who are different from me and have never seen them to be "dangerous" or in need of tolerance- people are people and to see them otherwise is absolutley moronic. I know people of my own cultural background who do things more rediculous than my Mexican neighbors would ever dream of doing and I see that fearing that which is different is pretty reactionary.
Is accepting different ideas fine but not accepting different people? Otherwise we might as well pitch progress out the window as well, because new ideas are what makes society move- it's what should provide me with my very own personal flying saucer at some point in the future as well, hopefully

Ideas and people are both similar in that both can broaden and deepen our lives, both intellectual and physical and to reject something just because it's different is cutting off our potential for development
I really don't think you're seeing a broader view of society at all... I'm not being ignorant of the facts, like you seem to think I am- I'm a minority in my own part of town and am not bothered by that in the least-
I personally think that judging someone based on color or culture is incredibly stupid and shallow 
I've never seen a point to doing that- I don't see those as different to be a threat to me- we're all people and it's not like they're barbarian invaders out to rape and pillage :rolli:
And to be honest, does anyone really have the right to say who does and doesn't belong somewhere?

Everyone's been an immigrant at some point... longer ago in some regions of the world than in others, but unless you're from and live in the Great Rift Valley, your ancestors moved
You seem to have a superior attitude towards people from "the new world" in your tone there in a way... I don't approve of my country's foreign policy for the good part, but I can't say that I appreciate you judging us as a people based on the decision of some idiots in Washington
If you look at the world's history it's generally the locations where people from different places rubbed shoulders, cities of trade, where the advances took place- where people could read and learn from the ideas of others and synthesize them into something new and better- it's not the socially isolated regions with no outside influence- otherwise there would be tribes in Borneo with nuclear capabilites or something of the sort. Even your "great men" stole ideas from others and synthesized them into their own- and we can't say that humanity wouldn't be better off without some of them because we didn't get the experience to learn what it would be like otherwise did we?
And to answer your question, I think that exposure to different cultures and different ideas will eventually change things to make that more possible... the ability to work together with knowlege from everywhere to make things work even better- I haven't yet seen a modern breakthrough in anything that didn't take ideas or people from various sources. Processes, especially social ones, are slow, but things DO tend to work out in the end