Since the Kylo Ren tag created by another user is now being used I regret that you were denied a Taxonomist badge. However, I am not responsible for the deletion of the tag you created "at least three times" and I stand by all my actions regarding the tag.
The conversation you are referring to might be the one you and I had a few months ago, though our conversation might have been one of the other "three separate occasions" you tried to add the tag. If you are referring to our conversation, I do not think I said anything to you that could be considered "nasty". In full disclosure, that conversation is still posted in the comments to one of your answers:
Kylo Ren is too minor of a character to have his own tag. Please don't create a tag for him. – Null Sep 10 at 15:01
@Null isn't he the main antagonist of the film? Darth Vader and Darth Sidious both have tags. – JMFB Sep 10 at 15:03
Possibly, but only of one film in the entire franchise. He is currently far too minor of a character to have his own tag. Only a few very major characters have tags. We don't have tags for Han Solo and Leia, for example. Please roll back your edit again or I'll flag for a mod. – Null Sep 10 at 15:08
See meta on character tags. – Null Sep 10 at 15:11
Vader and Sidious are both major characters who have appeared in six films and countless other sources (books, cartoon, video games, etc.). None of that is true for Kylo Ren. – Null Sep 10 at 15:15
@Null Han Solo and Leia are not the main antagonists or protagonists of a film or series. Luke Skywalker, Darth Vader, Sidious, etc. are. Kylo Ren is the Darth Vader of the upcoming movies. Read about him. The tag was approved fyi, so flag it if you like. And commanding somebody to rollback an edit or you're going to flag a mod sounds like a threat and highly inappropriate. And you gave me a link to one person's meta answer with 3 upvotes? That's hardly site policy. – JMFB Sep 10 at 15:18
Flagged. Ask on meta whether or not we need the tag if you really think we need it. – Null Sep 10 at 15:23
I did not command you, I said please. Since we are in disagreement the appropriate action is to flag for a mod to avoid an edit war. – Null Sep 10 at 15:32
@Null agreed. I like you and your contributions. This is nothing personal. Can't wait for the new movie to come out fyi. Hope it's more like 4 or 5 then 1, 2, or 3. – JMFB Sep 10 at 15:47
@JMFB Quit making the Kylo Ren tag. We know virtually nothing about whether or not it will be appropriate. At best, we'll know once The Force Awakens is released. – Keen♦ Sep 10 at 16:15
@Keen made it one time. It was approved. That's all I did. No need to give directives. – JMFB Sep 10 at 20:03
@JMFB You've done it twice, ergo the directive. – Keen♦ Sep 11 at 1:13
As I explained in the comments, I flagged for a mod in order to avoid a tag edit war. I edited the question to delete the Kylo Ren tag once and then posted my first comment above. After you added the tag back again, I asked you to please roll it back or I would flag for a mod to resolve the dispute. You refused, so I flagged. The mod and another user agreed with me.
I also posted a link to the relevant meta discussion on character tags and suggested you post a new meta question so the community could decide whether to add the tag.
I still think Kylo Ren is too minor of a character to have his own tag since he has only appeared in one movie out of the entire Star Wars franchise. (I haven't seen The Force Awakens yet, so please don't spoil whether Kylo Ren is alive or not at the end of the movie. If he's alive, he may eventually become a major enough character to deserve his own tag. If he's dead, he'll probably never deserve his own tag.)
Although I removed the tag from the question you answered, I did not systematically remove the tag from all questions on the site so that it would be deleted entirely. I only removed it from that one question, and that question should not have the Kylo Ren tag even if community consensus is that the tag should exist because that question is not about Kylo Ren. The original text of the question was:
[Title] Sith without masters
So the new Star Wars film has a Sith in it, his name's Kylo Ren. Hope I'm not spoiling this for anyone, but it's pretty obvious from the trailers that he's a Sith Lord of some kind, with his menacing red light saber and scary mask.
So if the last Sith died in Return of the Jedi, that got me wondering who trained this Ren guy.
That's not actually my question, just the inspiration. I want to know if there's any evidence in books etc. of any Sith who became Sith without having a Sith master to train them.
Thanks for your time.
The current version of the question is very similar. Kylo Ren received an incidental mention in the question, but the question is about the Sith. The asker even specifically said that "who trained this Ren guy" is "not actually [his] question". Furthermore, as your own answer stated that Kylo Ren is not a Sith Lord, the Kylo Ren tag does not belong on the question anyway.1
I don't know if your Kylo Ren tag was deleted as a result of its removal from this question, but if so it should have been deleted at that time anyway since there were no questions that warranted the tag.
You mentioned that you attempted to create the tag on "at least three separate occasions". Since I only removed the tag on this one question, I cannot speak to why the tag was deleted on these other occasions.
1 There are multiple meta answers explaining why character tags should not be used on questions which give an incidental mention of the character. For example:
A tag could help pinpoint the questions that are specifically about the character, as opposed to mentioning it in passing; but this is rather marginal, especially as a title search should be able to serve the same purpose.
If the tag is used on every question that mentions the character, that defeats the purpose.
The latter is also quoted in the meta answer I linked to in our comment discussion. All of these answers are upvoted, indicating strong community consensus.