That's not true. I saw it first here but this morning it was on several news websites.
Sauce:
https://www.nu.nl/buitenland/5670347/parlementarier-zwaargewond-aanval-in-bremen.html
https://www.telegraaf.nl/nieuws/2997274/bouwvakker-redt-leven-halfdood-geslagen-rechtse-duitse-politicus
https://www.bbc.com/news/world-europe-46792556
And so on…