Complex sentence: Dovnar-Zapol'skiy greeted the emergence of the "strictly objective and scientific" trend in Belarusian historical and ethnographical research, and showed general sympathy with Marxist theory but wasn't awed by it.
Split into simpler sentences: Dovnar-Zapol'skiy greeted the emergence of the "strictly objective and scientific" trend in Belarusian historical and ethnographical research. He showed general sympathy with Marxist theory but wasn't awed by it.