Sure, why not? Most of the illegals are Catholic...
Let me rephrase that: Most of the illegals come from mostly-Catholic countries ...
If the bishops think these people are going to be attending church and putting moo-la in the collection basket, they are seriously naive -- these people are only going to drain every system, including the bishops'.
I think the bishops know this perfectly well though, and it's part of their social and economic plan for America (one which, I would add, goes totally against Church teachings).
I kind of doubt that. I am sure many are non religious or members of the Evangelical and Pentacostal churches which are growing very strongly in Mexico and Central America. What you want find is many members of mainline Protestant churches.
You’re giving the Catholic bishops credit for shrewdness most of them do not possess. If anything, they are incapable of dispassionately plotting anything that actually would benefit the Catholic Church in the US.