Are we worth saving? We're a young race, cosmically. We've made great strides in that time, progressing from a creature with only the barest natural defenses to the undisputed lords and masters of our spinning dirt-ball. We've created art, music, literature, theatre, philosophy, and discovered mathematical and scientific principles that boggle a mind which we have yet to fully utilize. We've waged wars that have scarred the planet and left millions dead. We've mapped the human genome and weaponized disease. We split the atom, used it to power cities and level them; and have sacrificed ourselves to contain it once more. We've lived by the sword, by chivalry, by the dollar, by the scripture and doctrine of hundreds of deities. We've built walls and torn them down, altered the flow of rivers, leveled mountains, plunged to the hidden depths of our seas, and taken our first halting steps into space. And we are a young race, yet.
Are we worth saving? A better question to ask, oh Aliens from the great beyond, is whether or not you've got the power to stop us; utterly obliterate us in a single moment. If you can completely and irrevocably eradicate us, then whatever words are bandied are ultimately useless. Do as you will.
Otherwise, you might find that a horde of squishy monkey-locusts hell-bent on destroying themselves from the dawn of time might somehow direct all of their destructive potential directly at this new threat from beyond the fringes of their understanding. If there's one thing we hate more than people who are different than us, its things that aren't even people at all.
Pull the trigger or run. Clock's ticking.