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.
“Naturally I drew register a little exaggerated, in order to create something new in the sense of a sublime literature that sings of despair only in order to oppress the reader, and make him desire the good as the remedy.”