ZURICH—Events in Afghanistan could be a catalyst for the European Union to forge a common migration policy, European Commissioner Margaritis Schinas said in a newspaper interview. EU states are concerned that the Taliban takeover could trigger a replay of the crisis of 2015/16, when the arrival of more than a million migrants, predominantly from the Middle East, stretched security and welfare systems and fueled support for far-right groups. “It is true that we are now in a major crisis, but the EU did not cause the situation, yet we are once again called upon to be part of a solution,” the Greek commissioner, whose brief includes migration policy, told Austrian daily Wiener Zeitung. While not seeing a migration crisis, he said he wanted to “avoid a reflex that takes us back to the crisis year 2015 before it is even clear how the situation will develop.” The UN’s refugee agency …