I can definitely confirm that the AI pretty much attacks on sight (or maybe it can smell my humanity...). I broke through hungarian lines and egypt was behind them, got attacked by them the following turn.

I think the only reason poland didn't attack me immediately is because it was finishing off the HRE. When they were gone, urrghh !

I'll save money in future by building fewer envoys, bishops make better scouts as they convert the populace while they are scouting ;-)