Complex sentence: He used diplomacy to aid war victims and lobby for peace and, at times risking neutrality, shared intelligence with the Allies and used Vatican Radio and press to speak out against atrocities like race murders.
Split into simpler sentences: He used diplomacy to aid war victims and lobby for peace. At times, risking neutrality, he shared intelligence with the Allies and used Vatican Radio and press to speak out against atrocities like race murders.