Zen is to religion what a Japanese "rock garden" is to a garden. Zen knows no god, no afterlife, no good and no evil, as the rock-garden knows no flowers, herbs or shrubs. It has no doctrine or holy writ: its teaching is transmitted mainly in the form of parables as ambiguous as the pebbles in the rock-garden which symbolise now a mountain, now a fleeting tiger. When a disciple asks "What is Zen?", the master's traditional answer is "Three pounds of flax" or "A decaying noodle" or "A toilet stick" or a whack on the pupil's head.
Sometimes you're ahead of the game and sometimes people don't get it and that's just one of those things you have to accept and carry on.