Yes if you say that you are a Christian it’s actually going to put them into a threat mode. Because you are not in their religion, you are in a “false religion” and you may “trick” them away from their religion. So they will talk at you, and if you reason back then will give up. JWs only talk to people who they believe that they have a good chance of converting. If you start we win a conversation with a JW he/she will just give up and spend their efforts elsewhere. It is extremely annoying, especially if it’s your JW family members that you are trying to reason with. It’s amazing the power of daily brainwashing…