How not to argue for Roman Catholicism - an example from Mr. Matthew Bellisario (link). Here are a few tips to avoid Mr. Bellisario's mistakes (with a video presentation of the 10 points below):
10) If you're going to cite statistics, don't cite statistics that actually show Roman Catholic sexual abuse at about twice the rate once one adjusts for the size of the population generating the abuse cases.
9) If you're going to argue that celibacy is not imposed on the priesthood, don't make your leading argument that no one is forced to be a priest.
8) Don't reveal your ignorance of Reformed churches by suggesting that their "clergy" are self-appointed.
7) Don't ignore common sense, which tells you that people who are forbidden the option of marriage are more likely to have their sexual desire burst forth in some inappropriate way.
6) If you're going to quote Paul's writings about celibacy, remember that he actually confirms what we already know from common sense, namely that not everyone has the gift of celibacy, and that the result of not marrying for such people is that they burn with lust.
5) If you are going to pick a fight with someone on the issue of clerical celibacy and sexual abuse, find one of the many folks who assert that there is a connection, rather than one who asserts that there may be.
4) If someone points out that one cause of sexual abuse is clerical celibacy, don't assume that this means that the critic thinks that marriage fixes all sexual deviancy.
3) If someone points out that one cause of sexual abuse is clerical celibacy, don't assume that this means that the critic thinks that it is celibacy itself (rather than an absence of the gift of celibacy) that causes this problem.
2) If you are going to bring up the issue of sexual deviance, don't forget that prohibiting marriage for priests is intuitively a way to statistically increase your chances of attracting closeted homosexuals.
1) Recognize that sexual abuse is a scandal, not something to be treated frivolously with cartoon clowns and empty-headed rhetoric. Take the matter seriously, it's a serious matter.