Turkey’s concerns about security should be taken seriously, NATO Secretary General Jens Stoltenberg said on Sunday during a visit to Finland, amid Ankara’s lingering objections to Sweden and Finland joining the defence alliance. “We have to address the security concerns of all allies, including Turkish concerns about the terrorist group PKK,” Stoltenberg said. He was referring to the fact that Ankara continues to oppose the two Nordic countries’ bids to join the alliance due to their alleged support for “terrorist organizations” such as the banned Kurdish Workers’ Party PKK, which Ankara blame…