The most that one of Jewish faith can do - and some have gladly done it - is to say that Jesus was the greatest in the long succession of Jewish prophets. None can acknowledge that Jesus was the Messiah without becoming a Christian.
“There's the person that's the addict, and then there's the person that's who you are.”
“Somewhere in that 20-year period, I would assume that there will be some basically new approach that will begin to cut into it, but it's got a long time.”