Small nationalist communities are not going to be left on their own this summer,  said Gerard Rice, a former IRA prisoner who leads anti-Orange protests in a Catholic neighborhood of south Belfast. Riot police in armored cars, shields and helmets prevented a few hundred Protestants, many waving British and Ulster flags, from (interfering) with the Catholics as they marched within Portadown's few Catholic streets.  
 Verb: interfering
Yes