Two problems (among other suppositions) with your statement:
1. The illegals may learn the language and customs, but they have rarely have any affinity or allegiance to this country (see La Raza and Mexifornia by Victor Davis Hanson).
2. Wong v. US was a complete distortion of the 14th. See other huge mistakes and writing of law by SCOTUS such as Dred Scott, Roe v. Wade, and Kelo v. City of New London.