Great post. I'll say this about heresy though, it's real and worthy of hell fire. Dealing with it is problematic, not dealing with it is just as perilous.
Yes, heresy is serious, but the issue is the basis for determining it, how it is to be dealt with. Catholicism makes her presumed ensured perpetual magisterial infallibility the basis for what is Truth vs. error, which is heresy itself, and thereby sanctions coercive physical punishment to deal with those it deems to be heretical, and papal teaching required RC rulers to exterminate them, or else the people did not have to obey them. - Canons of the Ecumenical Fourth Lateran Council (canon 3), 1215; http://www.fordham.edu/halsall/basis/lateran4.asp
And which recourse is one of the many things Protestantism had to unlearn from Rome.
The Church has the right, as a perfect and independent society provided with all the means for attaining its end, to decide according to its laws disputes arising concerning its internal affairs, especially as to the ecclesiastical rights of its members, also to carry out its decision, if necessary, by suitable means of compulsion, contentious or civil jurisdiction. It has, therefore, the right to admonish or warn its members, ecclesiastical or lay, who have not conformed to its laws and also, if needful to punish them by physical means, that is, coercive jurisdiction. Catholic Encyclopedia Jurisdiction
► Q. 540. How did the Pope acquire and how was he deprived of the temporal power? A. The Pope acquired the temporal power in a just manner by the consent of those who had a right to bestow it. He was deprived of it in an unjust manner by political changes. - http://baltimore-catechism.com/lesson12.htm