I guess for some people it's easy to become a duck. As someone with a passionate hatred for ducks, I want it to be said there has to be compassion for those who are tempted to become ducks in an effort to protect their environment. If there's no way to voice your concern for western and democratic values without being labeled a duck, should they just not quack at all?
Well I'm not German so I can't really speak about what the AfD is about, and I'm sure there's a lot of actual Nazis voting for them. What is a topic however that is taboo because of association with Nazis is the influx of people with non-western ideals and values from Morocco and Turkey. Things like women rights, democratic ideals such as freedom of speech are under pressure as a significant portion of the population does not hold them. This problem is exacerbated when freedom of religion laws makes it so that subsequent generations are also educated with anti-western values. Mainstream political parties won't burn themselves on these issues, and the alternative political parties are often caught with Nazi's at their dinner tables.
People are voting AfD because they are pro environment?