The First Circuit has deferred to the Board of Immigration Appeals’ decision in Matter of JM Alvarado, and determined that an individual who assists a persecutor of others need not share the persecutor’s motive of persecution on account of the victim’s political opinion. Instead, so long as the direct persecutor was seeking to harm the person because of political opinion, the persecutor bar applies to any who aided that persecution, regardless of the aider’s motivation for doing so.
The full text of Alvarado v. Whitaker can be found here: