Yep you are arguing the odd views of a poster (CynicalBear) who claims that Catholics are idolaters, that those who celebrate Easter and Christmas are pagans and who claims that even the idea of church on Sunday is a man made tradition and apparently not either Christian or Biblical.
Yet even those who are Bible-only Christians forget that there are good Bible teachers who are Catholic, such as Scott Hahn and Stephen Ray.
http://www.catholic-convert.com/
Folks like that lose more and more of their faith in Christ and being more and more pagan each time with their rejection of the faith from, through and in Christ.