BOO!
When CHRISTIANS start claiming to be Jews, and the ONLY TRUE JEWS at that; THEN start to worry...
Madam: if you think that merely quoting the claims of the "new testament" proves chrstianity, then you must understand that mormons believe quoting the claims of the "book of mormon" proves mormonism.
Every religion claims to be true. The scriptures of every religion naturally support those claims. You can't "prove" a religion by appealing to its claims. You have to use objective standards.