You titled the thread "Why I like Luke Cage". IMO that equals "appreciation". Also, as has already been pointed out, opinions aren't worthy of threads and since this Appreciation thread already existed, albeit with no posts, they were merged. If you want to have a broader discussion about the nature of stereotypes then I'd suggest using a more appropriate thread title.
Additionally, upon actually reading the thread after I'd merged them, I saw that by your second, now deleted, post, you turned the thread into a discussion about other posters, not stereotypes and not Luke Cage. It's against this forum's rules to talk about or insult other posters, which is where the thread ended up. Discussing what you think others are feeling or threatened by...not allowed.
Lastly, posters don't "own" threads. They belong to the forum, so implyng that I've stolen from you by merging threads and deleting inappropriate posts...I really don't know how to respond to that.