It's not a contradiction to be a democrat, pro 2, and anti-illegals. The latest numbers, depending on who you believe, say 60% or more are anti-illegal. We couldn't have reached those numbers without dems. Especially when you consider that there are republicans the likes of huckabee, whitman, arnold, Mccain, etc, and all of there backers.
It might, however, be a contradiction to be pro 2, anti-illegal, and still be an obama supporter