Polling for the far-right insurgent and its extreme policies is rising but other parties have closed ranks against it despite their weak popularity

Germany’s far-right AfD party has signed off on its manifesto before next month’s critical election, proposing a series of deeply controversial policies on everything from migration to education as the campaign for a new government in Europe’s powerhouse formally kicked off.

The party, founded in 2013, endorsed the far-right concept of “re-migration” into its programme, threatening the mass deportation of migrants if they came into power.