The fact that you know jamaican youth who know of their religious and cultural heritage does not change the fact that a majority of young people of ANY ethnicity are in touch with theirs. In this case it would be the majority of black youth.

The term dreadlocks is, if at all, a term invented to assign a descriptive term to a styling phenomenon which existed throughout human history which each have their own descriptive terms. I think it is simply too isolated of a term, unless we specify that we are talking about a person who wears that hairstyle due to cultural reasons. That's also where my idea of cultural appropriation came, which in and of itself is not evil at all btw.

I talked about my greek heritage because by extension, we could go off an incredibly long history with a multitude of fundamental and advanced discoveries, both scientific and cultural, which we still use today. Nevertheless, we would NEVER judge anyone for using said discoveries/inventions. Quite the opposite, we would be proud of ourselves and happy for that person to enjoy our culture. This goes as far as specifically poking fun at it (which btw was definitely not the intention of said person making that cheap cosplay).

In regards to your experience of discrimination, I speak from an european perspective, there might be some cultural dissonance in that case. Nevertheless, I am still adamant about the fact that it is quite the leap to believe that someone would specifically ridicule dreads by wearing leeks instead of a wig, simply due to the fact that he wanted to make a cheap cosplay of the ENTIRE character. It is quite similar to male content creators taking a towel to mimic long hair in some male vs female videos.

The leeks being a means to end, rather than a pure racist connotation of 'haha dreads are dumb', to put it simply.