Overview
- He announced his resignation in an email circulated to Green members and civil-society contacts, which Tagesspiegel reviewed.
- He accuses the faction leadership under Bettina Jarasch and Werner Graf of narrowing internal debate and suppressing dissent.
- He says identity politics has come to dominate party work and faults the Greens for growing proximity to Die Linke, which he criticizes over handling antisemitism.
- He claims he was excluded from his brief and that his key topic of urban trees was reassigned after the Volksentscheid Baum gained prominence.
- He will keep his seat for now, intends to join another parliamentary group without naming which, and was not renominated as a direct candidate for 2026.