ST added that reports have been made on a rise of racism and that TUC have lobbied for Wales to issue an appeal for a ceasefire.
Ychwanegodd ST fod adroddiadau wedi'u cyflwyno ar gynnydd mewn hiliaeth a bod Cyngres yr Undebau Llafur wedi lobïo i Gymru gyhoeddi apêl am gadoediad.