Uhh wtf happened? We know he got trapped in some illusion or somewhat but if so why does he react so strongly to them?
His whole conversation with them feels weird to me.
These strange alterations probably reflect the culprit's personality, making everything seem blood thirsty or rejecting him. It's an illusion prank bro.
I think Lanfear has it right. I think it's almost unavoidable to hold doubts about others regardless of how close they are to you. Having an illusion poke at those particular doubts can hurt even if you know it's an illusion. I'm guessing that these are particular sources of doubt for Dran.