What part of "Illegal Entry" do you need explained?

19 Men from Pakistan and India plan on suing the Canadian government for being mistreated when they were arrested on suspicion of being terrorists. Excuse me while I laugh until I lose bladder control.

I don't have details on all the men but 10 of them were deported for immigration violations. That's better than half of them were here illegally. I guess they are just pissed that they couldn't claim refugee status, like Hassan Almrei.