Remember, religions don't have to include an afterlife, or contain a
god or pantheon of gods.
Atheists are always preaching their beliefs and trying to impose their
beliefs on others.
Atheists are always trying to convert others.
Atheists are always trying to crusade and destroy the religions of
other people, replacing those religions with their beliefs, trying to
force others to share their beliefs, because THEIR system of belief is
somehow better.
And above all, atheists have dogma (complete with mantras which they
chant) that they adhere strictly to, and bully other atheists into
adhering to.