WW1 had nothing to do with the JWs false prophesy. The end of the world dates started in 1873 I thought. Compare that with their whole history and you can see that the JWs would use anything they can to get membership up. And by anything, I mean theocratic warfare. They would [did/do/will] lie and lie and lie.
I am still amazed that anyone would still buy into their beliefs that reason that the bible doesn't mean what it says, it only means what the WTS says.