The Guardian view on Syria: MPs should say no to airstrikes without a strategy

There is a right way to approach a question as serious as whether the UK should extend airstrikes against Islamic State to Syria – and a wrong way. The wrong way is to view it through the lens of the bitter debate about the future of the Labour party and in particular its leader. For all the drama of Monday’s decision to allow a free vote, the threat of Isis is too grave to be used merely to undermine or shore up the position of Jeremy Corbyn.