Protestants say that Catholics don't follow the Bible, but they do, yet they don't do the MAIN thing that Jesus demanded them to do.
There were many things that the Lord instructed us to do, and while He may have placed greater emphasis on some, He never indicated that some were mandatory while others were voluntary.
I am curious though, what is this "main" thing that Christ demanded that Catholics aren't doing? And please keep in mind that, not doing something the way that Protestants do it, does not mean we are not doing it. One thing that most fundamentalists are either unaware of or unwilling to admit is that the fundamentalism they espouse is VERY recent and rejecting by a vast majority of the Christian world.