the fact that you personally do not believe what the Church teaches does not alter the fact that it is a divine institution. For 2 thousand years the Church has proclaimed this truth and now you have suddenly decided to disagree with it. Doesn't it strike you as at least a little odd that after all this time you, solely upon your own authority have come to this conclusion and expect everyone to agree with you?
It seems as far as you are concerned those who profess and those who in their lifetimes professed the Catholic Faith in the Catholic Church only do or did so out of 'institutional loyalty'. It is highly unlikely that Satan would come up with that one, wanting Catholics to remain steadfast in their Faith is the last thing Satan desires, why do you think he inspired the abuse scandal?
The devil may be evil but he is not stupid.