THE African Union (AU) has criticised Tunisia and urged it to avoid "racialised hate speech" after President Kais Saied ordered the expulsion of undocumented migrants and said immigration was a plot aimed at changing his country's demographic makeup. Tunisia's Foreign Ministry said on Saturday it was surprised by the AU statement issued late on Friday, and rejected what it called "baseless accusations" that it said misunderstood the government's position. The AU voiced what it said was "deep shock and concern at the form and substance of the statement" issued by Tunisian authorities and reminded Tunisia of its obligation within the…