The Goa`uld invade Earth, SG-1 are contacted through the Gate and they are on a planet that has technology that can repel the Goa`uld attack. Only problem is the owners won`t give it to them.
Do they go home in a huff? Or do they do whatever it takes to acquire that technology?
We are of course assuming that there is no other way to repel the invasion. Their allies can`t help, none of the tech they have can help.
What would you do?
Personally I`d kick the crap out of as many of those people as I had to to get the only technology that could save my planet. I might have a tad of an ethical crisis afterwards but i`d quickly realise I didn`t have a choice and I`d know that I did the right thing.
As for the threat of retaliation, that`s a bit of a circular argument. If you stole the device it is very possible that the owners would attack you and would most likely be more powerful. But if you didn`t the human race would be either extinct or slaves and there`d be no one for the aliens to retaliate against.
It`s a case of giving the human race a chance by defeating the Goa`uld even if it means we`re killed off by another race. Atleast that way you have a chance of survival.