Like the Imperial Order, who also wished to destroy those with magic, the Blood showed their hypocrisy in using those with the gift to help further their cause, despite preaching the evils of such people. Though this could be seen as how a police officer used a gun against an armed criminal.
The Blood of the Fold were lead by a Lord General, the most recent of which was Tobias Brogan, before his death. The Blood were apparently wiped out during their confrontation with the D'Haran Army and its allies in Aydindril. A smaller force was also destroyed at the Palace of the Prophets.