Warlocks are used to being in library's and whatnot for research and the such, whereas hunters and are on the front lines and often behind the enemies. Warlocks are book smart hunters and street smart, generally speaking. Often the book smart tend to have ideals that fall into place perfectly whereas street smarts know that isn't the case. I could see this as being a form of animosity between the two as they will often be on the opposite views of each other. Warlocks have plans that require actual people. Hunters are those actual people. Actual people don't often like being told exactly what's up by people living in their ivory towers, so to speak, who don't actually know as much about the things they should be subject matter experts in. Also Warlocks are more us/we collectivists and hunters are more solitary and aloof and don't like being lumped in with the generalness. Warlocks are thinkers and hunters are doers. Titans are just the muscle. Or whatever.