As to Iraq and WMDs, you could prob call him a “stooge” if you wanted to. But the little I know from a distance, that was something that racked his conscience for the rest of his life.
Grenada, they never had time to think about it - it took three days for the most mighty military in the world to secure one of the tiniest nations in the world.
After 9/11, Rumsfeld asked the Army for their plans. They gave him a stack of plans on occupying Afghanistan and requirement for 600K troops (per doctrine) - they had no intention of volunteering. He was furious to be sidelined when the CIA guy convinced W it could all be done with small teams and airpower.
For Iraq, Rumsfeld agreed to all their plans and they saluted happily when he said to not make any occupation plans...
I wouldn’t be surprised if back in the Grenada/Panama era of the 80’s that there may have been many chomping at the bit. These days, I’m guessing not so much.