>>76927742New jersey is heavily catholic in the DC universe. But also most churches in gotham are Catholic, it's filled with poles and italians, since bruce went to a catholic school and there's a lot of "demonic" elements in the batman mythos O'neill started to focus in that. While Batman may work as episcopal and is portrayed like that by many writters even more writters use the catholic aproach: the Guilt, and absoluteness when it comes to life and death, the whole "crusade", etc.
As for the taoism it was in Legends of the dark knight, i can'trecall the numbers, but something between 50 and 60. Since the 70's the whole Asian philosophies had been a part of batman, but it was just in the 90's that it was said ot was taoism. It also feats the character really well.