i'm pretty sure that wont happen (its been written).
What are you talking about?
Asteroid impacts are regular occurrence in Solar system. They have happened before, and there is no reason to believe they won't happen again.
if it even is to, everything will be wiped out including Mars before we can go anything further out of the safe zone (exploding sun for example)...
It would take much more than an asteroid hitting Earth to destroy Mars as well.
Natural evolution of the Sun will take on the order of billion years to get to the point where life on Earth will no longer be viable.
no war world based on indisputable text
What kind of text?
btw, if by chance they find abundant amount of plutonium (or even anti matter) there, we (they) will have more resources to go further (or maybe to kill who are not in line )
With the short halflife of plutonioum, here is no reason to think that there are any significant natural sources of it anywhere.
As for antimatter, there is none on Mars.
All that being said, Mars is a very difficult place to set up a colony. There is nothing on it that Moon doesn't provide just as well, except somewhat higher surface gravity, which helps with health, but is a major nuisance for a location that would depend on space travel for survival.
Atmosphere is just horrible. It's way to thin to provide any protection - you still need spacesuit. For space travel, it makes aerocapture difficult - you need heavy heat shield, but get little help from it
It is also just thick enough to kick up dust that gets into everything and acts like abrasive destroying mechanical devices.
There is no water except at the polar regions - a location which sucks for space travel.
It's far from Earth.
Moon is a better location for colony in every category. Well, day/night cycle sucks a bit.