Press freedom groups are calling on U.S. Customs and Border Protection (CBP) to return cell phones it seized from fringe progressive writer Max Blumenthal, just days after far-right activist and conspiracy theorist Laura Loomer demanded that federal authorities arrest him. The action is part of a war, it would seem, between fringe corners of the internet. Still, the Committee to Protect Journalists said Blumenthal's interrogation and device sei…