Re: Catholics, SIL is (as I said earlier) very Catholic, and frankly a credit to what that actually means. She hates a lot of American Catholicism because she finds it so conservative and out of touch even by the standards of the Church (she's super pro-choice as are most Catholics in Europe, for example), yet is so blase about a ton of the things that make you Catholic (like how
everyone gets communion, even toddlers who don't get what it is). So I know all their theoretical future children will be raised Catholic, but I don't worry about them, because she's got a good view about what's really important and doesn't mind discussing these things with her atheist sister in laws.
People with different views who love and respect each other, crazy in these times, I know.
Re: kids, I am at the age where I can heartily confirm that a lot of people pressure you about them, over all races, creeds, religions, etc. But I'm also at the age where I realize people just pressure you about a lot of shit, and you've gotta just know how to keep saying "when we do, you'll be the first to know!" and change the subject.
But yes, I'll also confirm, my biggest hesitation in remaining in the USA would be raising children in a society that clearly doesn't care about them or families in any way, but that's probably a rant for another time.