unite nations saudi arabia birthplace islam saturday condemn government myanmar policy repression minority rohingya muslims country gravely concern condemn policy repression force displacement carry government myanmar rohingya minority foreign minister adel al-jubeir say speech unite nations general assembly bangladesh aid organizations struggle help 422,000 rohingya muslims arrive since aug. 25 attack rohingya militants trigger myanmar crackdown unite nations brand ethnic cleanse saudi arabia condemn myanmar government 'policy repression