Seda Suleimanova, a young woman from Russia’s republic of Chechnya, was detained in St. Petersburg and returned to her home region last summer. She had fled Chechnya, a conservative, majority Muslim region of the North Caucasus, after her family threatened to kill her for being “insufficiently religious.” This month, rights activists announced that she may have been killed by her relatives in an “honor killing.” Activists say Suleimanova’s case underscores the increasingly perilous situation for Chechens attempting to escape persecution — and the impunity with which Chechen authorities increas…