Oh Tonydisciple.. there are so many threads about this in the other forums hahaha
One thing we have to understand is that there is ONE doctrine that we follow, not the traditions and added doctrine of man. Not any denomination has it 100%, but we MUST continue on in the Holy Spirit. That being said, if any denomination preaches something contrary to the Word of God, walk away from it. The Holy Spirit will not contradict Himself and as such, you should be able to enter ANY church around the world and the message should be exactly the same. Man's doctrine comes in and twists and mixes it up.
Sectarianism Is Sin
10 Now I plead with you, brethren, by the name of our Lord Jesus Christ, that you all speak the same thing, and that there be no divisions among you, but that you be perfectly joined together in the same mind and in the same judgment.
Now this doesn't apply to just the Catholic religion, but to all denominations and any "group" that "calls" itself "Christian."