So what changes in a war for Cheetoriah to invade the Deer's Universe?

Make up some bullshit stories to start a terrorist attack within it's own nation 3 times, just to justify to declare war on the Deer's Universe. Take their oil from the west and change political figures that are way more stupid in the Deer's Universe.

That's how political clowns are created in the Deer's Universe during somewhat the last days.