You're talking about doomsday cults, not major world religions. The existence of even a single church-run soup kitchen is the black swan that destroys your argument. Major world religions are very much concerned with the here and now and taking care of the people in it.

churches spend aid money/donations very, very ineffectively, when they do spend it on non-evangelical causes.

Why does a soup-kitchen disprove it?

The single most recognizable sign of Catholic identity is the sign of the cross received on Ash Wednesday, at the imposition of which the priest says, "Remember, man, you are dust and to dust you will return."

Even the cross itself - a contender for most recognisable sign in religion - has a lot of symbolism associated with death.