Tell them if they descide to destroy us then they better do if fast before we destroy them!
When we have their attention, tell them, yeah some people are flawwed, hell everyone is, but it's our spirit and want to help everyone around us that makes us great.
then show them technology, art, music, and other stuff that shows the powers of the human spirit.
If all that fails, we repeatedly nuke them till they go away.
No point begging them to save us, that alone will be reason for them to want to destory us.