If you are unhappy with a law, get a majority. AfD just like it's spiritual predecessor in the NSDAP won't get that. The best Hitler got before his Machtergreifung was only 43% right after the Reichstagbrand.
There was a path that we - thanks to the magic that is hindsight - can clearly see now and we should use that knowlegde to prevent history from repeating, but one thing is certain: The political extremes won't play by the rules, let alone play fair, to reach power. We've seen this with Hitler, we saw it with the Republican party in Florida 2020 to get Bush into power and we've seen it with January 6th and again with the preparations republican across the country do to prevent voters from voting or not validate results.