Complex sentence: Hindenburg tolerated the use of his negative words on posters by the expropriation opponents, which laid him open to the accusation that he was not aloof from party politics but was openly supporting the conservatives.
Split into simpler sentences: Hindenburg tolerated the use of his negative words on posters by the expropriation opponents. This laid him open to the accusation that he was not aloof from party politics but wa openly supportingthe conservatives.