Sorry but these people whether they called themselves Mexicans, Mexican Americans, World Citizens or whatever were a distinct alien group within an established endemic culture. They looked, acted and behaved differently than the native population. When this phenomena occurs anywhere, regardless of the religious, social or political motivation of the newcomers, there is more often than not eventual barbaric violence and massacres. Read history. There is also a large Hasidic settlement in Mexico. They too are in danger.
BTW do Mormons send their young people as missionaries into Muslim countries? One would hope not.
After being there a hundred years, that whole newcomer thing is pretty much a laughable claim.
That isn’t necessarily true at all.
It can be true in some cases, yet not true in others.