Ice cream brand Ben & Jerry's said in a lawsuit filed Wednesday that parent company Unilever has silenced its attempts to express support for Palestinian refugees and threatened to dismantle its board and sue its members over the issue.

In escalation of long-running tensions, the ice-cream brand says its parent company blocked statements in support of Palestinian rights.

The paperwork says that the merger agreement between Ben and Jerry’s and Unilever prevents the parent company from stopping Ben and Jerry’s social mission. That social mission includes their public and progressive stance on issues like migrant justice, LGBTQ+ rights, and Black Lives Matter.