Assuming you're genuinely not trolling, and that this really is a matter of not understanding each other, here's how it appears to me (and potentially others, I cannot vouch for them).
In this statement, over-archingly, you're stating that you support legal immigration (and by virtue, do not support illegal immigration), something I'm sure most won't disagree with. You then state 'as long as we pick and choose the best for the future of the US', this one you might get some detractors for, as our country was founded on the principles of openness and acceptance for all. Now, there's nothing strictly wrong with that, it's more of an opinion on what's best for the US as a whole. Basically, should we let in only the best ('ivory tower' ourselves) or let in everyone (melting-pot scenario). Some support one way, some support another, whatever. Now, the definition of 'best' is where things get tricky. If you say the best as in, the best programmers from India, that likely means the most highly trained, most skilled, most experienced, whatever. Again, some may have complaints about choosing the best in this fashion as it creates a knowledge vacuum everywhere else, and makes America very insular as a result, but that's still just an opinion and navel-gazing.
The big point of contention came up with your specific example of what you feel is the 'best for our future of the US', you used 'smart' as the example, then listed some presumably smart legal immigrants (which I don't think anyone would argue). The 'smart' qualifier, specifically, indicates intelligence, which is a factor of biology/genetics. If you did not mean for it to, that should have been corrected/clarified. This, though, is the way I saw how this information and your stance was presented. Now I'm perfectly willing to accept that I don't know what you were thinking, I can only interpret what you said, but the onus is on you to present information in the way you wish for it to be interpreted. If you had said 'f those genetically inferior immigrants' then stated 'no, I meant that the US should only invite in the most highly trained', it would be a more obtuse example but look just as absurd (to me).
Again, I can only speak for myself in these matters, and it'd be good if the previous poster who attempted to call you out on this to elaborate further so more than two points of view could be seen here, but this is how the information came across to me.