Illegal Immigrants - II

I got quite good response about my post on illegal immigrants. And I feel I should reply those in public forum.
Comment: Illegal immigrants are criminal and they involve in illegal activities.
Response: There are legal citizens too who involve in illegal activities so you can not generalize.

Comment: They change demography of the region.
Response: Changing demography is not their intention it is driven by politicians. Sometimes even legal citizens can change demography don't want to point out communities but there are evident examples in many cities like Kolkata.