Nevertheless I would not count on them surviving. The AfD constantly has to fight the Nazis in there, split itself in one German state (Bawü), wants to get rid of their subdivision in another state (Saarland) and has members from Nazi parties they have to exclude of all over the place. Meanwhile Merkel and the established parties already moved to the right and the refugee crisis is largely over - at least in Germany. Lately Merkel is even gaining in popularity polls again.
These are people who don't value freedom or equality. They are driven by hatred of anyone different from themselves and accept as moral only what confirms that hatred, sometimes bastardizing religion in the process.
They're not special. They are no different than the people so many have fought throughout human history to get the freedom and the approximation of equality we have reached today.
The only noteworthy thing about them is that they've shown that many people are too comfortable in their human rights. Those rights aren't natural and they aren't self-evident only our belief in them is. Human rights do require work not just to acquire but to maintain, wherever and whenever you are.