They should experience anxiety if they are illegal. If they aren't, but are worried for their friends who are--whose fault is it? No one made them illegally come into the US. I am tired of people crying when they finally have to pay the consequences for their actions. Your choice, your problem.
Illegal? The land once belonged to them, and but for war, theft and illegal purchases the entire south/southwest (at least) would belong to Mexicans and other Latinos. Yes, we have "laws" that forbid their immigration w/o permission. Based on the history, are those laws just?