Christianity Promotes Science, Right?

I keep hearing that Christianity is what created a strategic advantage by promoting scientific progress in the West. Today, I stumbled over the following illustration that highlights this issue in graphical terms:

(original source)

As for claims that all significant libraries were located in monasteries:

Nothing beats claiming to promote science if you killed all non-believers first and prohibit the general people from even learning to read.

I guess I'll keep advocating Atheism for a while...