Complex sentence: At his funeral, however, many Nationalist Afrikaners believed and perpetuated the rumour that it was a government assassination, which added fuel to the fire; this was even further inflamed by Siener van Rensburg and his controversial prophecies.
Split into simpler sentences: At his funeral, however, many Nationalist Afrikaners believed and perpetuated the rumor that it was a government assassination, which added fuel to the fire. Their anger was even further inflamed by Siener van Rensburg and his controversial prophecies.