I’m sorry but you have your doctrine mixed up. The Catholic Church does not REQUIRE families to have any particular number of children. That is ridiculous and ignorant on your behalf. The Church only requires that families be OPEN to as many children as God blesses them with. By your profile you are a Protestant, and I am going to assume that you trust your life to God. Why, if you trusted your life to God, would you slam the bedroom door in his face? It is hypocritical to do so.
You say that Catholics could never “be objective” on this issue of over-population, but I question whether you can “be objective” in your assertions about the Catholic Church, and if not, who are you to go around pointing fingers at other “un-objective” people??
Either way, the fact is that we have PLENTY of resources in the world to sustain the current (and future) population. The problem lies in how we distribute those resources. And even if the world is “over-populated” abortion is not the answer. Female infanticide in China is not the answer. Can we just start killing off anyone based on a certain set of criteria, such as:
a. they’re not wanted
b. they’re not productive
c. they aren’t a certain age…
etc etc. Pretty soon, we could justify taking your life, just to “save” the world from the dreaded “over population.” Are you ok with that? As you sister in Christ, I would have to say that I’M not ok with that. Your life has as much value and is due the same amount of love, respect, and dignity as anyone else on this earth.