It already has!
In the west alone, in just the past year, 3 police officers have been murdered by illegal aliens, and many other illegals have left a path of thousands of American victims in their wake, not to mention to what these millions are doing to us economically etc.
How soon everyone forgets, one of the mass murdering DC snipers, that had the entire region of that part of the country in a damn panic for weeks, was another illegal alien. American's are a patient people, and the patients is now paper thin, or in many cases, completely gone....