It's not unthinkable, especially if they feel confident that they have a technological advantage that would shield them from detection or in-kind retaliation. They also have somewhat different notions of citizenship/nationality than Western countries, and they have a few diasporas they'd like to control.
> 3 If there are enough money in this there will be people going to work on the project, so I am sure the US will have good droning software
What makes you so sure of this, or that those people will have the necessary talent? Lower quality software could lead to more collateral deaths.
> 4 US brought this on itself with the way they used the drones , like you have the verb "droning"
Contemporary drone-strikes are literally just regular airstrikes: for instance, the weapons the drones use were actually developed for other military aircraft [1] [2] and adapted to drones.
[1] https://en.wikipedia.org/wiki/AGM-114_Hellfire
[2] https://en.wikipedia.org/wiki/Joint_Direct_Attack_Munition
The only real difference is that there's no pilot in the plane, so less risk he dies in a crash. And I say crash because most of the drone-strikes happened in places where there were few hostile anti-aircraft weapons to actually shoot anything down. Most of the pilot risk would have been from mechanical problems and human error.