Complex sentence: His antecedents, education, and calling, as rabbi in Frankfort-on-the-Oder, made it almost impossible for him openly to renounce the old rabbinism; and he consequently endeavored to advance his ideals anonymously or under a pseudonym.
Split into simpler sentences: His antecedents, education, and calling, as rabbi in Frankfort-on-the-Oder, made it almost impossible for him openly to renounce the old rabbinism. Consequently, he endeavored to advance his ideals anonymously or under a pseudonym.