Yeah, but imagine if someone came up with something great and then spread it out, telling people that Jesus said it.
For instance, "Thou who devour strawberry ice cream are evil and will go to Hell without passing Go!" That was Jesus who said it, to his teacher, during a debate. Regardless if the statement in itself was true or not, wouldn't it upset you that someone is lying about what Jesus said only to promote their own ideas? How about having Jesus say, "Christianity is a false religion." Christians would blow a gasket, I'm sure if someone claimed this. Why? Because they know Jesus wouldn't have said it, but rather the opposite. Attributing Einstein to say something that he probably wouldn't have said at all is rude and dishonest. I wouldn't invent and lie about what Jesus said, so why would any religious person lie about Einstein? There's no need for it. Present the idea, but don't put it in the mouth of those who is dead and can't defend themselves.