Not true, the current mess was created in 1986 when the ONE TIME AND ONE TIME ONLY amnesty was passed, that amnesty encouraged more to come here. Candidates running today have records going back to 1986. They also have records on border enforcement and employer sanctions.
Ok, in the abstract, yes you have a point - that some of the folks running have something to do with the current problem of illegals. But on the whole, this problem goes back a lot longer than 86 and is a lot bigger than any laws passed or not. It is largely the impact of a supply and demand issue plus an open border. That is far more important than anything any of these guys did or did not do, but you have a technical point.