Mexican
I have citizenship to live in Mexico .
If you have dual citizenship, yes you can.
There are currently some 1,100 Polish holding dual citizenship and living in Mexico, mostly in Mexico City.
He is both Mexican and American. He has dual citizenship.
It allows it but does not recognize the foreign citizenship(s) of a Mexican national. This means that you should enter and leave Mexico using your Mexican passport and, while in Mexico, you are not allowed to seek consular assistance from your other country(ies) of citizenship if you get in trouble.
No. If you are a a native-born or naturalized American citizen your citizenship cannot be removed from you - UNLESS - you used fraud in order to gain your American citizenship.
unfortunately, not the parents.
For 30 years, granted you have the Mexican citizenship.
As long as said person has a citizenship in Mexico, they should be able to stay for as long as they want. However, it may be wise to get an identification card, but it shouldn't be needed.
Only if at least one of your parents holds a Mexican citizenship.
This is my personal situation: I have both citizenships and my mother is mexican, my father is american, I was born in the States and have lived in Mexico practically all my life, so both countries now allow dual citizenship. In Mexico this is relatively recent, allowing this since approximately 2002.
Apply for citizenship through the Bureau of Immigration.