"to punish a supposed war crime that may never happen again?"

Under this logic, why ever bother trying to deter anything? Your kids may never again wipe shit on your walls. A rapist may never again rape another person.

I'm really confused with all the "angry-blah" I'm seeing around "yeah, he probably gassed all those civilians/children, but what are ya gonna do, right?"

There are plenty of principled reasons to choose from for why it might be a bad idea for the US, or anyone else, to strike Syria.

Try picking one of those next time.