Your comment is too true. Beyond false arguments, begging questions, generalizations and Ad hominem propositions, I've found that what seems to motivate the non-Catholic is the "gotcha" question; any inconsistency will do. And, if you don't answer in the "gotcha" mode, Catholicism becomes populated by logger heads and mind numbed robots. There seems to be a motivation to disprove 2,000 years of Catholic history, Catholic worship, and Catholic theology as well as Catholic Scripture. All of which undercuts their own paradigm known only to them (of course by the grace of God).
JoeT