HEATHENS & PAGANS!!!!!!!! In the battle of the Gods, which God triumphed and was able to convert all of Europe?

If Zeus and Thor were real, why were they so easily phased out? Why could they not stop their followers from adopting the Bible and Jesus as the Lord, their God? And the fact that Christianity dominates Europe and North America, does that not prove the superior power of the Lord Christ and those who believe in Him?