A whole raft of opinions that have no backing, in fact, I can provide a lot of evidence that counterargues your points.

> Dumb kids don't benefit from being around very gifted kids. Let's not use the words dumb but lets say, "less smart". If this were the case, why would parents fight to get their kids into magnet and charter schools? Also special needs kids benefit from mainstreaming. Evidence > Unsubstantiated opinion.

> The very gifted kids are going to isolate themselves from the dumb people as quickly as they can [cite needed]

> They do see the very gifted kids and feel bad. [cite needed] - in fact, as a "gifted" kid, I often felt ostracized because of being selected (nerd).

> I think you'll find that parents are very uninterested in your theories of social engineering [cite needed]