Hi stAnn
I do not agree with your opinion of Jehovah. As far as I can see he is trying to allow us to understand why our way simply doesn't work and we have been given enough time to understand this. But at some point he has to stop us getting so brutal and selfish we destroy everything and nothing can be saved.
Have you thought that what really condemns us now, is not what we do out of ignorance but what things we do these days truly knowing they are wrong and yet still do them.
Why send Jesus his son with a message of peace and love if Jehovah's grand plan is just to destroy? If Jesus had destroyed the Romans as the Jews wanted him too he would have been lauded as messiah by pharasees and saducees alike! why wait until a time when we humans do far worse than the romans but yet know how wrong it is?