That clip shows that he hates Christians, not that he loves science.
It's not even accurate (to the extent that any counterfactual can be considered accurate). If Christianity had never existed, would that have prevented the fall of the Roman Empire? Unlikely. Even if it had, were the Romans in the 3rd Century AD making huge strides in science before Christianity came along? Nope. And you'll note that when modern science did eventually arrive, it showed up in the Christian part of the world rather than the other 90%, which suggests Christianity can't be retarding scientific or technological progress that much.
Does it show that he hates Christians? I would say it indicates he is strongly critical of the role Christianity has had on the world. The strongest that you could say is that it shows that he hates Christianity.
Hating Christians though? That is an unfounded allegation. For example, I hate all religions, including but obviously not limited to Judaism. However, if you said that I hate Jews, that would be slander. It is incredibly untrue.
