Ok but what's your point ? Do you think Europe and in the US should do the same ?
Yes, even Mexico does this.
Mexico has very strict laws pertaining to both illegal and legal immigrants.[25] The Mexican constitution restricts non-citizens or foreign-born persons from participating in politics, holding office, acting as a member of the clergy, or serving on the crews of Mexican-flagged ships or airplanes. Certain legal rights are waived, such as the right to a deportation hearing or other legal motions. In cases of flagrante delicto, any person may make a citizen's arrest on the offender and his accomplices, turning them over without delay to the nearest authorities.
Mexico will start deportations if too many immigrants threaten their culture or identity.
http://www.washingtontimes.com/news...illegals-laws-tougher-than-arizonas/?page=all
https://factreal.wordpress.com/2010...-states-mexican-immigration-laws-are-tougher/
http://www.newsmax.com/US/border-patrol-deport-illegals/2015/01/06/id/616828/
http://townhall.com/columnists/mich...ats-undesirable-foreigners-n1550120/page/full
• The Mexican constitution guarantees that immigrants will never be treated as real Mexican citizens, even if they are legally naturalized.
Article 32 bans foreigners, immigrants, and even naturalized citizens of Mexico from serving as military officers, Mexican-flagged ship and airline crew, and chiefs of seaports and airports:
“In order to belong to the National Navy or the Air Force, and to discharge any office or commission, it is required to be a Mexican by birth. This same status is indispensable for captains, pilots, masters, engineers, mechanics, and in general, for all personnel of the crew of any vessel or airship protected by the Mexican merchant flag or insignia. It is also necessary to be Mexican by birth to discharge the position of captain of the port and all services of practique and airport commandant, as well as all functions of customs agent in the Republic.”
• An immigrant who becomes a naturalized Mexican citizen can be stripped of his Mexican citizenship if he lives again in the country of his origin for more than five years, under Article 37. Mexican-born citizens risk no such loss.