Common sense says, "Don't bother arguing with someone named 'Ron Mexico'" (see Proverbs 26:4 for general guidelines), but I'm inclined to think that, sadly, his brand of south-of-the-truth, insulting nonsense is more than commonplace:
Catholics claim opposition to all birth control. You didn't need to follow the latest dust up between between President Obama and Catholicism, Inc. to know that much. But every last Catholic, it seems, has grossly misinterpreted the particulars of that particular divine mandate.
The most god-awful form of contraception, which gets condom usage confused with taking communion, is voluntary, intentional abstinence. At least condoms fail once in a while.
Do Catholics claim opposition to all birth control, if by "birth control" is meant controlling the number and occasion of conceptions and births? Not according to the Catechism of the Catholic Church, which Mr. Mexico has likely never touched, let alone opened, read, or considered:
A particular aspect of this responsibility concerns the regulation of procreation. For just reasons, spouses may wish to space the births of their children. It is their duty to make certain that their desire is not motivated by selfishness but is in conformity with the generosity appropriate to responsible parenthood. Moreover, they should conform their behavior to the objective criteria of morality ...
Periodic continence, that is, the methods of birth regulation based on self-observation and the use of infertile periods, is in conformity with the objective criteria of morality. (pars. 2368, 2370)
The regulation of births represents one of the aspects of responsible fatherhood and motherhood. Legitimate intentions on the part of the spouses do not justify recourse to morally unacceptable means (for example, direct sterilization or contraception). (par. 2399)
Read the entire section from the CCC. Perhaps Mr. Mexico is unaware that contraceptions are not the only means of regulating procreation. However, judging from the argument he makes next, he's not concerned to much with facts or fairness: