Twitter hides Donald Trump tweet for “glorifying violence”

One can also check easily-discoverable recent US military policy https://news.ycombinator.com/item?id=23347453 to discover that those who think these things through don't condone "looting ⊃ shooting".

Bonaparte was a fan of the "whiff of grape" https://fr.wikipedia.org/wiki/Insurrection_royaliste_du_13_v... but we all know how that ended.

Isn't it a long standing thing that the US Military use of force rules in warzones are generally more restrictive than the policies for use on their fellow citizens by police back home?

Yes

One obvious example of this is simply ammo. Military bullets don't expand as much as bullets available to cops or civilians. A military bullet is explicitly not allowed to be an expanding hollow point which really messes you up.

There are all sorts of international agreements on not using certain types of things in war - types of bullets are no exception.

Correct, hollow-point ammunition is prohibited by the Geneva Conventions. This has always baffled me since large caliber and high explosive munitions (120mm HEAT rounds from an Abrams) are regularly used against soft targets in combat, not to mention things like hellfire missles or JDAMs. That's the rules of war for you.