"It is exceedingly difficult to form any very precise idea of the Albigensian doctrines because present knowledge of them is derived from their opponents and from the very rare and uninformative Albigensian texts which have come down to us. What is certain is that, above all, they formed an antisacerdotal party in permanent opposition to the Roman church and raised a continued protest against the corruption of the clergy of their time...." [Copyright © 1994-2000 Encyclopædia Britannica, Inc., Albigenses]
If you want to claim them, you can. I just would caution you against it.