So far, the opposition in Germany is populist and disparate. But the attacks open the door for a major, organized run at the electorate by the “Alternative für Deutschland,” a right-wing party founded in 2013. The party has profited from the influx of refugees and now has approval rates of about 7 percent — enough to enter a state parliament in one of the three state elections coming up in March. On Monday one polling firm, INSA, even saw the party in the double digits, with 10.5 percent, for the first time ever. Its influence on national policy will rise accordingly.