So SPD and FDP voters are the ones migrating towards the right?
Not necessarily. Non-voters also exist, and different people become non-voters at different moments in time. Social-democratic voters who're dissapointed in the SPD might be staying home, while previous non-voters might be showing up for the first time to vote AfD, because they finally see a chance to make that party large/vote against the entire political spectrum/etc.
When Elke Kahr became mayor of Graz, a detailed analysis of voting patterns showed that the KPÖ was able to attract many non-voters from working class and marginalised backgrounds for the first time, while at the same time their succes demotivated FPÖ-voters who stayed home. If you simply looked at the bar-charts, you'd think a big FPÖ to KPÖ swing happened, but that wasn't the case.
Not necessarily. Non-voters also exist, and different people become non-voters at different moments in time. Social-democratic voters who're dissapointed in the SPD might be staying home, while previous non-voters might be showing up for the first time to vote AfD, because they finally see a chance to make that party large/vote against the entire political spectrum/etc.
When Elke Kahr became mayor of Graz, a detailed analysis of voting patterns showed that the KPÖ was able to attract many non-voters from working class and marginalised backgrounds for the first time, while at the same time their succes demotivated FPÖ-voters who stayed home. If you simply looked at the bar-charts, you'd think a big FPÖ to KPÖ swing happened, but that wasn't the case.