Not only is it a demographic, but the people who protested this past weekend will be directly affected by the proposed legislation. Many more of them face the prospect of arrest, imprisonment, deportation, disruption of families and death.
The members of the anti-war movement face few similar risks, despite their liberal whining about government spying. Most members of the antj-war movement are privileged Americans who are unwilling to take any personal risks to back up their convictions. Groups like ANSWER exploit this by organizing series of spectacular (not very) mass mobilizations which are primarily about establishing people as the "leadership" of the movement and shaking down the peace lemmings for cash.
It looks like ANSWER--ever the predictable opportunists--have seized on the recent immigration protests as the latest way to make more money. They've printed some more of their ugly ass signs which all have the latest ANSWER website.
Donate money now so that the WWP central committee can have new clothes for their trip to sunny North Korea!
Chuck