Complex sentence: He adopted the swastika, which contained occult significance from earlier cultures, it is also the symbol for peace and harmony e.g. Budhism and Taoism therefore we cannot say that it is entirely Occult it just contains some occult significance, as the symbol of Nazi Germany.
Split into simpler sentences: He adopted the swastika, which contained occult significance from earlier cultures. Therefore we cannot say that it is entirely occult; it just contains some occult significance, as the symbol of Nazi Germany.