I suggest that creationists have a predisposition to accept authority - whether it is their religious text which has to be taken literally and accepted as inerrent, or in their choice to submit themselves to the authority of a spiritual master.
With this mindset, creationists think that argument from authority trumps any other form of evidence and therefore are inclined to quote mine. And they do not care if a particular quote is consistent with quotee's considered position or not, as long as it superficially apppears to support the creationist's view.