Why is it that people who love to say they "tell things like it is" get upset when people tell them how they really feel the same way about them?

Person A: I love people who are honest.

Person B: I think you need to be more tactful.

Person A: I'm just being honest, if they don't like what I say then they are just oversensitive babies.

Person B: I thought you liked it when people are honest.

Person A: No response and leaves.

Why is it that people who love to say they "tell things like it is" get upset when people tell them how they really feel the same way about them?
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