I chuckled at the religion being good for science thing - it was hilarious due to the fact that over and over in history we see that states highly controlled by religion sooner or later start to work against science, with Christianity being just one of religions which did this.

As for your arguments writing was discovered for the needs of trade some 5000 years ago in ancient Mesopotamia.

Even before Christianity spread trough the Roman Empire German tribes begun to settle in the Roman Empire and become literate. The Roman Empire was also the one to spread Latin - Christians just took it so they spread their faith trough the Roman Empire much quicker.

Cyril letters were created by priests because at that time the Church eliminated anyone with the knowledge of linguistic except themselves naturally.
 
The printing press was invented in China and Gutenberg only improved it.

Both the Academia of Athens and Great Library of Alexandria to were crushed in the name of religion. Even today India is struggling to shake out of the Caste System imposed by Hindu priests. Aztecs sacrificed incredible amounts of people to appeal to their gods. So much wrong came from unions between states and religions that the risks heavily outweigh any possible rewards. Trough it is not that religions are a bad thing but when they are joined with the state it usually resulted in bad things.