Look some in the church I was raised in thought they were the only church going to heaven too. Their main ones to attack were the Catholics which I still don't agree with doing to any degree of condemnation. I disagree with the RC church doctorines on some things but do not see it as being the key to ones salvation or loss thereof. It's a waste of energy for both churches and changes nothing.
Be content where GOD has placed you. If it's Roman Catholic fine, Baptist fine, Church or Assembly of GOD fine. Church of Christ fine. Methodist or Luthern? etc. Some limited exceptions I question like United Church of Christ. I would question because of their deeds and their fruits. From that sect has came some real damage to us all if you follow the attacks on the church and moral attacks on this nation.
I couldn't be content with a theology that "works" even when God's participation is not necessary.