Well I mean the official reason, not the actual reason - that they don't have resources to take. If one country was invaded for the reason that they possibly have, and this one definitely has, then...
Because what you see on TV is media propaganda making you believe that this is yet another threat to our free and equal society. If the US is the most powerful nation why are they always so afraid of what others do? They dropped two atomic bombs nearly 70 years ago but no other country is allowed to have them apparently.