Liberalism's Great Challenge?

[Jehanne]

[...] (and, remember, the word 'heresy' means 'choice") [...]

No, it doesn't. That is its etymology, not its definition or current usage. You'll find its meaning here.

Let me clarify my point some more.  Heresy, as understood by the Medieval Catholic Church, meant choice.  That's how the Inquisitions used the term.  From Saint Thomas Aquinas's Summa Theologica:

I answer that, the word heresy as stated in the first objection denotes a choosing. Now choice as stated above ( Ia IIae, q. 13, a. 3) is about things directed to the end, the end being presupposed. Now, in matters of faith, the will assents to some truth, as to its proper good, as was shown above (q. 4, a. 3): wherefore that which is the chief truth, has the character of last end, while those which are secondary truths, have the character of being directed to the end.  Now, whoever believes, assents to someone’s words; so that, in every form of unbelief, the person to whose words assent is given seems to hold the chief place and to be the end as it were; while the things by holding which one assents assents to that person hold a secondary place. Consequently he that holds the Christian faith aright, assents, by his will, to Christ, in those things which truly belong to His doctrine.  Accordingly there are two ways in which a man may deviate from the rectitude of the Christian faith. First, because he is unwilling to assent to Christ: and such a man has an evil will, so to say, in respect of the very end. This belongs to the species of unbelief in pagans and Jews. Secondly, because, though he intends to assent to Christ, yet he fails in his choice of those things wherein he assents to Christ, because he chooses not what Christ really taught, but the suggestions of his own mind.  Therefore heresy is a species of unbelief, belonging to those who profess the Christian faith, but corrupt its dogmas. (Summa Theologica II II, Q.11, A.1)

http://www.newadvent.org/summa/3011.htm