hello belinda

this sounds like a very dangerous situation

the boys are very young and possibly, in a bad case, they “echo” each other with words about outrage/revenge etc.

– i hope you can talk to the police
– consider moving away from there (i mean just considering): arkansas seems to be a more racist state in the us
(according to https://www.thetoptens.com/states-provinces/most-racists-states-us/)
– maybe you can use google / google maps to find any parties you can talk to or get help
(i searched this site but it has no anti-racism office if that is a thing anyway…: https://arktimes.com/arkansas-blog/2021/01/08/where-to-get-help-a-resource-list); or a hotline to get help maybe??
– talk to your taekwondo coach, maybe ask for help, talk about the fight just like you explained it in your post and that you fear your opponent might still feel  agitated and growing his hostility seeking for revenge
– if anyhow possible speak to any people that seem kind, more open, peaceful/adult etc. …. to get witnesses/allies
– maybe you can find someone to walk you home (for instance after taekwondo) etc. so you don’t walk around alone much
– if there is room for kindness/diplomacy you can visit the boy in hospital (and bring some friends of yours to be more protected) and bring flowers and excuse… (if you have a way to take the first step towards them, that lets you know better how they feel and you get a current view over the situation. on the other hand their beliefs are likely very strong and this can also still be very dangerous or just in vain)