I agree that those who wish to immigrate should do so legally. Illegals are largely miscreants and criminals in their home country, who would be denied immigration status if they applied, and thus, come across illegally. They are disporportionately represented among the criminal underclass in our own country, and any attempt to marginalize or legalize them undermines our own internal security.
I am not insensitive to the rampant poverty that a minority of illegals are trying to escape; however, their escape should not be a "free ride" in the form of welfare and/or medical benefits. Too many Americans who could use the temporary assistance welfare was meant to provide are denied it in part because of the costs incurred by the large numbers of illegals.