Debbie Schlussel has the answer. They were prevented from doing their jobs during the protests:

We got word from ICE agents in Michigan and Ohio that they wanted to attend the rallies (which, in Detroit, were RIGHT in front of their building, the McNamara Federal Bldg.). They were ordered by their boss, Michigan/Ohio ICE Special Agent in Charge Brian Moskowitz a/k/a “Abu Moskowitz” to stay away from the rallies.

Remember what I wrote about the coming anarcho-tyranny as a result of this undermining of the rule of law?

And then, just as has happened in Great Britain, Canada, Australia and Italy, will our leaders impose upon us anarcho-tyranny? In other words, will they continue to refuse to control the criminal, allowing anarchy among the illegals, and, instead control and tyrannize the innocent?

Well, the proper authorities were prevented from controlling and interdicting the illegals as Debbie Schlussel reveals, it appears they may, instead, be tyrannizing a lawful citizen for exercising his rights:

A Tucson man was arrested Tuesday for his role in the burning of a Mexican flag as part of a counterprotest at a pro-immigration rally.

Quite frankly, I think that American citizens are screwed. It appears that the politicians and business interests want to replace us with new constituencies.

It would be one thing if we were getting a bunch of Einsteins or Mozarts or truly exceptional new constituents. Instead, we are getting a people who will live paycheck to paycheck and who will be particularly vulnerable to economic downturns. If one of those happens, they will be living on the dime of the American citizen–that is, the American citizens who aren’t forced into economic straits due to things like this.

Another good question, will these new constituencies become beneficiaries of affirmative action set-asides despite the fact that none of them were here to be discriminated against in times past? Vdare dares to ask.

Yep, we’re screwed.