What do you mean Mexicans won't assimilate. They have been assimilating in American culture for hundreds of years. Undocumented immigrants general do not assimilate, regardless of nationality because they lack documentation and are here illegally.
This is actually incorrect.
Undocumented immigrants do in fact assimilate, learn English, and contribute to society as a whole.
And that one might be undocumented doesn’t mean he’s in the country ‘illegally’ – due process must be first afforded before a determination is made by an immigration court that an undocumented immigrant is not entitled to asylum and refugee status, and entered the country absent authorization.
This illustrates the tragedy of Republicans hostile to immigration reform.
Immigration reform measures will have a provision for due process allowing those undocumented to acknowledge they entered the country absent authorization, pay any appropriate fines, fees, and taxes owed, meet other conditions and requirements, and start the process of becoming LPRAs and eventually citizens.
Of course, Republicans oppose immigration reform because of their unwarranted fear of immigration and wrongheaded animosity toward immigrants.