Carestream Health Engineer interview questions

I did several phone interviews with Carestream for a field engineer position. The first was with HR and the second was with the hiring manager. Towards the end of the last phone interview, the hiring manager told me "So I see on your application that you marked you were not comfortable talking about your current salary, why is that?" I politely told him that I did not think it was relevant information figuring that would be the end of it. He did not like that answer at all and got argumentative telling me how he couldn't understand why someone wouldn't like to talk about their current salary. In some states that's actually illegal... The next day I received a rejection letter.