is there anything to think about that when the arrogant alien civilization came to destroy the earth, even if we earthlings are going to protect our planet with heavy lethal weapons,nukes,etc...but in the end result is not going to be change with the single attack from that arrogant alien civilization we're just going to turn in dust just like Thanos did. So, I don't think there is anything we can do if any arrogant alien civilization came to earth with the motives to destroy the earth. So, when that time came SEE YOU IN THE HELL/HEAVEN GUYS.
THANK YOU.