Complex sentence: From the End of communism to 2011, he successfully evaded prosecution for human rights abuses committed under the Kádár regime while living in relative obscurity, but involving himself in revisionist causes trying to portray the dictatorship in a favorable light.
Split into simpler sentences: From the End of communism to 2011, he successfully evaded prosecution for human rights abuses committed under the Kádár regime while living in relative obscurity. In the meantime, he involved himself in revisionist causes trying to portray the dictatorship in a favorable light.