I responded to your first statement, that you had to amend it so quickly early on shows how poorly it was constructed.
Mandatory sentencing is lazy and dangerous. First off...maybe there is a valid reason to loot...or a more sympathetic one. Perhaps one has a dying spouse, and the pharmacy has the meds but they are too expensive. So to save his wife, a man takes advantage of a riot and loots the pharmacy for her meds. Maybe some dumb kid takes a Mountain Dew, and while technically "looting", isn't really on the level of property value to constitute a significant punishment, but because we would have "mandatory" sentencing, he gets punished none the less.
We have judges for a reason.
If nothing was done that would require jail time, how is making sure they are destitute, hurting even more, and now more likely to violently lash out going to help anything? Oh...it doesn't.
Freedom of speech is not the same as rioting. Freedom of association is not the same as rioting, freedom of assembly is not the same a rioting. But because we have these, because we recognize the rights and liberties of the individual, there WILL BE rioting.