The 911 hijackers did not come in from Mexico. They came here mainly 100% legally.
People also should stop conflating this issue with terrorism as well.
According to the INS, three of the 19 hijackers were here illegally on expired visas, and two were able to obtain valid visas despite being on U.S. intelligence agency watch lists.
They came here legally, perhaps, but overstayed their visas. They sure took advantage of our disfunctional system. We have 3.1 million visa overstays "somewhere". Everyday we hear of a green card holder who commits a crime. This government can't handle the situation now and you are willing to allow another 15 to 20 million become "guest workers"?
Remember now, these new guest workers are "undocumented", right? That means they'll apply for their amnesty (er...guest worker)with NO documents. Just pick a name! THAT will be the name this government will issue a visa to. What a way for a criminal to gain a new identity with all the priveleges of a "guest worker". Many municipalties allow them to vote, get welfare.
What a country!