I heard someone (a "double winner" - someone who attends both Al-Anon and AA) once refer to Al-Anon as the doorway to AA. This individual started attending Al-Anon meetings with an alcoholic spouse and family of origin, only to realize once he started actively working on the program that he needed to be in AA as well.
Who knows what will happen? It's a start.
Besides, in his mind he's already tuned you out to keep up his wall of denial. He hasn't realized that Al-Anon will tear down that wall, too, rather than allowing him to build up his "victim" routine.
Maybe good will come of this.