Why would they want to stop us from fleeing? It doesn’t reduce their expansion rate, and we already established that we don’t pose any serious threat to them. We would essentially be giving a perfectly good planet and star to them, undamaged by war (we would probably have enough time to launch at least some nuclear missiles, probably not harming them much but wrecking the ecosystem and making the planet ill-suited for colonization by biological life). Unless they’re just sadistic and value the destruction of life as a final goal, I see no reason for them to care. Any planets and star systems that would be colonized by the escaping humans would be taken just as easily as Earth, with only a minor delay.
Because over the billions of years of our flight, we could develop technology that could be used to counter them, especially if interstellar warfare favours the defence or scorched earth is possible.
Why would they want to stop us from fleeing? It doesn’t reduce their expansion rate, and we already established that we don’t pose any serious threat to them. We would essentially be giving a perfectly good planet and star to them, undamaged by war (we would probably have enough time to launch at least some nuclear missiles, probably not harming them much but wrecking the ecosystem and making the planet ill-suited for colonization by biological life). Unless they’re just sadistic and value the destruction of life as a final goal, I see no reason for them to care. Any planets and star systems that would be colonized by the escaping humans would be taken just as easily as Earth, with only a minor delay.
Because over the billions of years of our flight, we could develop technology that could be used to counter them, especially if interstellar warfare favours the defence or scorched earth is possible.