The rebels want humanity to go to war with aliens - after the war was ALREADY lost (hence the surrender).
The problem is - if there is to be a second war, it would lead to human extinction. This is not numerous human slaves uprising against their few human masters - this is humanity rising up against a vastly technologically superior species which has an unsurmountable advantage.
The ending of the film doesn't resolve anything - rebels get one of their members into the alien mothership and the film ends - so, it looks like a pilot for a tv show which never came to fruition.
Given that there will be no TV show from this mess - I suggest peeps skip this, because it feels like an intro episode rather than a complete film. Skip.
Regarding the "insurmountable advantage": this usually doesn't stop people from trying. After all, the alternative is oppression, misery and death. In general, people usually tend to not prefer this.
And also, I suppose you haven't seen War of the Worlds, Independence Day, or any of the other countless movies that have similar story lines?
But I agree, if realism is to be served, the resolution to all of those movies (i.e. human victory) are highly unlikely. Except maybe War of the Worlds, where the aliens are simply ill-prepared morons.
You go to war only if there is a chance of success. I haven't seen anything in this film that would suggest even the slightest chance of success. I'm sure if the tv series were to start from here, they would eventually find some sort of massive weakness and win the war - as is the case with vast majority of tv series of this sort.
In independence war, they made a discovery - a major weakness - hence their independence war.
War of the worlds.... err... aliens die all on their own.
At the end of the day, this being a probable pilot of tv series, my point stands - there's no point in seeing this given that the tv series never materialized. If this was never intended to be a pilot of a tv series, then it's simply a horrible written film.
Strictly speaking I never mentioned anything about war. War is usually a conflict (a disagreement if you will) between nations or in the "space-future" between worlds.
In neither of the movies I mentioned was there any "war". Invasion by a superior (alien) force is arguably not a conflict. This was about survival.
The jive in this movie about war felt more like a poetic slogan by the film makers, similar to the "war" in War of the Worlds. It's basically marketing, it sounds better.
About the discovery in ID; that was way after they incited rebellion. It came later and made it possible to defeat the aliens.
The movie Signs is also another good example of ill-prepared moron aliens, even more so than War of the Worlds.
The TV show "Falling Skies" is also a typical example of "futile resistance". That show went on for far too long, however :(