Having read so much incorrect information about Islam, it occurs to me that they recognized factual errors that Muslim studies were probably calling them on.
And yes,jws do preach at Muslims. My aunt tries to witness to me by supposedly recounting her studies with a Muslim woman. Oh and she thinks generalizing her experiences working with a Muslim employer would influence me. While I know there are dodgy employer s in every religion, she made the mistake of assuming (or fibbing about, for a good witness) her former Sikh boss was Muslim. I met him before I became Muslim and asked him about his faith(red turban gave it away).