For me, the problem is not about disagreeing, it's almost always about not being able to find a way to address the disagreement. In this forum, that is almost always about not being able to find any common ground from which to approach the issue. Matters of science that conflict with whatever scripture is the most obvious case in point. Matters of moral and ethical reason are often worse.
In truth, I genuinely want to continue learning and growing, but I have to say that doesn't happen here very much. My favourite example of the moral and ethical is the punishment of David (for getting Uriah the Hittite killed after he knocked up his wife Bathsheba), by killing their son, slowly and painfully, as the Bible describes. I have asked people if they would defend their own father, their President, their government, their king, or anyone else for doing such a thing...and after all have replied "absolutely not" change their tune instantly when asked, then why would you defend God for doing it?
Well, that simply points to the obvious -- you cannot reason when the topic is religion. There are too many constraints on what you are allowed to think about where God is concerned, and therefore all that's left is to fall back on tarnished apologetics that make me cringe. Ever really, really read William Laine Craig, famous for the "brilliance" of his apologetics? They're appalling, in too many cases!