Common sense dictates that if there aliens able to travel the vast distances of space to reach us, than they are so technologically advanced that we pose no threat to them if they contact us. It's like us fearing ants because they are hostile.
On the other hand, if they are just a little ahead of us, and if their ship has been traveling for thousands of years to get here, and if they are all in stasis awaiting the day of their arrival, we may be able to blast them out of the sky on their entry into orbit around earth.
If they are anything like us, their people do not exist any longer. Thousands of years ago already, they have had civil wars on their home planet, that at least pushed their people back into some kind of dark, dark ages... if not destroying their whole race entirely for all time... except for the group in stasis on their way here, that is.
They pose no threat to us. It's their own stupidity that poses a threat to them. We're just mopping up. They're as good as gone as they would have been if they had never made the trip.
And, Btw, our self-destruction is coming as well. The only reason we haven't done it to ourselves already is, we haven't been strong enough in the past. Somebody's finger is gonna slip and accidentally launch some nukes. Then everybody else will do it on purpose, in retaliation. We're good as gone right now.
