It's pretty clear that, if these are from non-human intelligence, THE MESSAGE IS: Our disclosure to humanity will go well only if you don't force conflict. That would instill fear quicker than anything else. We can't demonstrate more clearly how superior our technology is to yours, without actually showing might. If you force us to show our might, you will send a message to the people that fear and battle should ensue. The visual of our tech obliterating yours is not a good foot to start on.
It's pretty clear that, if these are from non-human intelligence, THE MESSAGE IS: Our disclosure to humanity will go well only if you don't force conflict. That would instill fear quicker than anything else. We can't demonstrate more clearly how superior our technology is to yours, without actually showing might. If you force us to show our might, you will send a message to the people that fear and battle should ensue. The visual of our tech obliterating yours is not a good foot to start on.