Complex sentence: Khrennikov's speech caused the deepest indignation of Mikhail Gnesin who accused Khrennikov in duplicity: not daring to criticise Lokshin in professional environment, he attacked him ideologically as one of the leadiang Soviet officials.
Split into simpler sentences: Khrennikov's speech caused the deepest indignation of Mikhail Gnesin. Gnesin accused Khrennikov in duplicity: not daring to criticise Lokshin in the professional environment, he attacked him ideologically as one of the leadiang Soviet officials.