There were a few keys for me, regarding the symbolism. A big one was Abraxas if you remember hearing the protagonist emphatically yelling into the phone that he didn't listen to Abraxas, doesn't want Abraxas, etc. Of course this is symbolic of rejecting God. The creepiest symbolism was looking out the window and seeing a big parking lot, during his discussion with one of the rabbis. The symbolism of the parking lot is existential threat, nuclear holocaust and annihilation. Indeed the closing moments had the tornado or hurricane bearing down on the parking lot just in case anyone didn't get it. Of course all three rabbis were made out to be buffoons.