@Kolyo,
False on 3 counts.
In Christianity for 2000 years the existence of God is not a subject of Faith. That is from reason.
The Catholic holds that the articles of Faith (i.e. the Creed) are divinely revealed and only received by grace. However, there are certain premises that are known either in themselves or can be known by philosophic investigation. These premises can be known by the pagan. Saint Thomas Aquinas explains:
The existence of God and other like truths about God, which can be known by natural reason, are not articles of faith, but are preambles to the articles; for faith presupposes natural knowledge, even as grace presupposes nature, and perfection supposes something that can be perfected. Nevertheless, there is nothing to prevent a man, who cannot grasp a proof, accepting, as a matter of faith, something which in itself is capable of being scientifically known and demonstrated.
Summa theologiae Ia, q. 2, a. 2, ad 1.
Now you will say, well I don't accept that. But wrong again. The point is that Judaism and Christianity had your criticism in mind for a few thousand years now.