Of course, it was the failure of those who allowed the institution of our ridiculous immigration policies. But the fact is that the majority of the people entering our country vote for socialists. They are a more proximal cause than the actions of those who made mistakes 50 years ago.
I think you are wasting your energy on wrong target. The horror of the situation is that your own compatriots, born and raised here for generations, are turning against you and your values. Immigration problem, real or perceived, is fixable, given ability and desire. Turning your kids back on track is much harder. Immigrants are not to blame for Obama - there were too few participating. The culprits are of your own home-brew. The coalition of parasites and perverts was not shipped here from abroad - you grew it here.
Spearheaded by none other than the Coward of Chappaquiddick, Teddy Kennedy.