Ireland’s top diplomat in a visit to Lebanon on Monday expressed his concern over the slow progress in criminal proceedings against several Lebanese men charged with the killing of an Irish peacekeeper in 2022 in the tiny Mediterranean country. Micheál Martin, Irish foreign and defence minister, said he was “very, very concerned” about the case. He met with Irish peacekeepers in south Lebanon and with Lebanese Foreign Minister Abdallah Bou Habib and a representative of the Lebanese defence ministry. Lebanon’s military tribunal last June charged four men with the killing of Pvt. Seán Rooney, 24…