Yes, that is directly related. I think the protests were a much needed morale boost for all middle-plus-left voters, but the real power is still with the swing

Yes, that is directly related. I think the protests were a much needed morale boost for all middle-plus-left voters, but the real power is still with the swing voters that can give their vote to either the legacy parties or the AfD. The fact that many parties now woo these swing voters enfuriates much of the middle-plus-left electorate. They consider not voting for the AfD to be a no-brainer democratic duty anyway and dismiss the notion that one should entice these 25% of voters with anything. Kind of as it is with Trump. As to why the swing voters might vote for the AfD, consider that the right-most non-AfD party is the Union (CDU+CSU) of Merkel that welcomed 1mio Syrian refugees in 2015 and has, mostly passively, overseen a massive influx of Ukrainian, Syrian and Afghan migrants. There is currently no right-of-center party that is neither the AfD and can credibly claim to limit migration.