I understand literally what you are saying, which means that I understand the meaning of the language you have chosen to use, and the implications thereof.
I do not understand the motive and intentions behind what you are saying. I do not understand the context for why you hold this position.
I am not calling you unreasonable, I simply disagree. Please don't put words in my mouth. I simply want to understand why you hold this view.
If this doesn't make sense, then I'll try to come up with another way to put it.