"They knew enough." Shuri and T'Challa wouldn't have just airdropped Bucky into the village and not warned them that he's dangerous, mentally unstable. At least, he wouldn't believe that they didn't tell anyone that they need to be ready to put the crazy one-armed foreigner down if he starts spiralling.

"Didn't seal me into a mud hut and leave me to rot, if that's what you're worried about." Even if that's the kind of fate he deserves. They might be eyeing something less pleasant than that for Zemo though. They won't be happy to know that he's out and about. Especially the fact that he's here, after all that time they spent trying to help Bucky.