Britney Spears is still furious with Victor Wembanyama's security ... calling his use of physical force in Vegas last week completely unnecessary -- while demanding he issue a public apology.
The "Toxic" singer opened up about the situation Tuesday in a video posted to her Instagram ... after she says she heard a local radio host say she deserved to be hit in the face for touching Wemby.
She called out the station for the opinion ... explaining in all her years of touring and being in public around rowdy fans -- her security team has never taken things that far.