Definitely not true. It sounds like you are German and if so it is pretty sad how little you keep up with your own election even though it happened just a few days ago. There are more AfD voters in eastern Germany but most Bundesländer have >18% AfD votes.
People tend to forget that Hitlers NSDAP only needed 18% in 1930 and a rigged election in 1933 to completely take over the country.
Coping doesnt get us anywhere. Its not always "the others" that vote far-right. Its the whole country, the educated just as well as the uneducated, the poor and the rich. Almost everyone has family members or friends that vote far-right and we need to talk to them, try to understand their motives and make them understand that AfD wants to make everything they fear 10 times worse.