The Guardians tried communicating and they failed. They too had to go to war.
This is all according to the Ram Tah-decoded codices, and remember, Ram Tah has a vested interest in you buying his guns. There has also been no independent oversight or methods of 'translating' said codices. You cannot take this as gospel and there have already been several demonstrable differences in what Ram Tah said would happen and what is happening now.No that's entirely very wrong. They at first did not want to fight the Thargoids and didn't pick up weapons. They made numberous communication attempts to the point that they knew and understood the Thargoid language. Yet the Thargoids did not want to/respond to any attempts at communication. The Thargoids chose to continue their hostilities instead of communicating. Therefor the Guardians had to pick up the weapons and defend themselfs. The Guardian AI had nothing to do with the Thargoids, but did it's actions because of Guardian Civil wars.