Calling the crackdown an “embarrassment to humanity,” Turkish Foreign Ministry spokesman Hami Aksoy said the death of detained Uighur poet and musician Abdurehim Heyit had prompted the ministry to issue its statement. Turkish media asserted that Mr. Heyit, who was serving an eight-year prison sentence, had been tortured to death.   Mr. Aksoy said Turkey was calling on other countries and United Nations Secretary-General Antonio Guterres to take steps to end the “humanitarian tragedy” in Xinjiang. The Turkish statement constitutes…