Why aren't we going after the people who hire the illegal immigrants, the ones who give them a reason to come to this country in the first place? This would be way more effective than any wall/increased border security.
Someone else also countered my over stayed visas, so why aren't we going after them, should be seeing busses every where escorting people to airports to be send home to their country of origins?
We should be doing that.
The reason for the wall is that built infrastructure cannot be "scaled back" by the Democrats once they get into power again and decide to encourage law-breaking by foreign nationals once again.
The wall is the single most important piece of this because we cannot trust the opposition to continue enforcement actions. We need a "concrete" commitment to stopping foreign invasions. The Left has lied OVER and OVER and OVER again that "this time we'll REALLY stop the invasions, once we just naturalize another 10 million!" and then somehow the same situation continues.
Even beyond those lies, the reason for the wall is that we don't trust our political enemies to follow the law. We already see how attorneys general will refuse to defend laws they don't agree with and "settle" with litigants that they actually agree with. It is happening in Michigan as we speak, in fact.
So your other enforcement measures are welcome, but insufficient because we know the left will simply stop enforcing them once they get power. At least the wall will still be there and destroying it will exact a significant political price as it will be open defiance of the will of the voters.