There is a significant difference in outlook between the Catholic and the person who interpretes the Bible for themselves, heck some people who call themselves Catholic do this.
The real Catholic submits his will to God and follows God’s belief so it is not of himself. The belief is not the Catholics so they are not equal, the belief is of God. Same with some Muslims and some Protestants.
Now for those Protestants whose beliefs are themselves, as their beliefs are what they have decided them to be. (I am not speaking of all Protestants, that is impossible) This is very common with the Bible alone, without any faith tradition Protestants. Without context to understand the Bible it is self understood by the person.
So if the person identifies themselves with the belief they will be offended when you attack the belief, as it is equal to attacking them. This is why so many self interpreting Christians react so emotionally when you get into discussions.
What I would stress is that we can attack the belief system without attacking the person, whether or not they personally equate it to them is how they have come up with their faith. If they personally have determined their own faith, then yes you are attacking both, if they have submitted to a faith system then, no there is not an equality but something they might defend, until you prove it wrong or they prove it right.
In Christ
Scylla
I don’t consider myself anti-protestant, I just consider myself pro-God. I try and work with individuals not belief systems, such as sola scriptura, sola pastora, sola mea, sola etc…