A new state law that prohibits discrimination against transgender people in public restrooms is “punishing” the protected religious speech of churches and pastors, a conservative Christian organization claims in a federal lawsuit filed Tuesday. Alliance Defending Freedom, based in Scottsdale, Arizona, said it sued on behalf of four Massachusetts churches to protect their right to operate their facilities “in a manner that doesn’t violate their core religious beliefs.” The lawsuit names Democratic state Attorney General Maura Healey and members of the Massachusetts Commission Against Discrimination as defendants. The law, which was signed by Republican Gov. Charlie Baker in July and...