I looked, ok skimmed, at AfD's platform and if they're considered "far-right" then people don't know the definition of far-right.
They support a multitude of social programs like an UBI, minimum wages, support for single mothers and other lefty non-sense.
But they like guns, not enough to go to our level of freedom but for Europe they're not bad.
They are also mostly market-oriented so good but with strong government oversight which is meh.
They do not like or appreciate Islam though. And want to curtail immigration and close Muslim schools amongts other things. Which seems like a sane thing to do. I'm guessing this last bit and their strong stance on maintaining German culture is what gets them branded far-right even though they are all over the place.