I play on medium and am always the one doing the attacking. I'm playing the Crusades campaign now as Antioch and the Turks never leave their defensive position. Occasionally, they'll send out their Turkomans, but that only happened twice.

I notice the other Islamic faction, Egypt, isn't attacking me, I am tempted to say it's passive, but I think it's just getting it's butt kicked by the KoJ.