I know everyone likes to hate people who complain of unfair treatement, but in this case there really was unfair treatment.
The user created a valid tag. By that time it was clear from all the released material that Kylo Ren is a major character. I shall avoid posting 3-page-long bullet list of why, to avoid spoiling people.
The tag was challenged without knowing this and without bothering to check this fact (e.g. on main site or Meta), and deleted without seeking the site consensus on Meta, as is appropriate for tag deletion
The practical effect of this action was that the user was deprived of an official, SE-promoted, activity (creating new good tag) - and as a consequence of that:
- user lost a chance to earn a rare badge awarded for creating a tag that is used by 50+ questions[1]
Then, to add insult to injury, someone else created that tag and will get the badge that the OP was deprived of.
The only correct way to make things right is to:
Apologize to the OP for the rash action of deleting a tag without ANY community debate (which would have resulted in people - myself included - being able to present evidence that it's a major character and worth its own tag). A brief comments thread doesn't count, as few people likely saw it.
Restore the opportunity to get the badge to the user. While a bit drastic edit-wise, it's doable:
delete the current tag, from all quetsions, and let the OP re-create it once it's gone from the database.
As an alternative, ask SE team to change the tag's creator in the back-end database to the OP.
[1] - I know 10 people piled on a bandwagon and upvoted a snarky "nobody owns a tag" comment to the OP (where were the moderators enforcing "civility" then?), but that badge indicates that the tag creator IS treated differently by the site, and is rewarded. That's not "ownership", but it is user-specific.