Live a good life. If there are gods and they are just, they will not care how devout you have been, but will welcome you based on the virtues you have lived by. If there are gods, but unjust, then you should not want to worship them. If there are no gods, then you will be gone, but will have lived a noble life that will live on in the memories of your loved ones.
Christianity could not content itself with building up its own altar
Christianity could not content itself with building up its own altar; it was absolutely forced to undertake the destruction of the heathen altars. Only from this fanatical intolerance could its apodictic faith take form; this intolerance is, in fact, its absolute presupposition.
Mein Kampf, Vol. 2 Chapter 5