In 2007, the party was fiercely divided as one faction supporting Jacob Zuma fought successfully to remove Thabo Mbeki as party head. Mantashe said insults hurled at Zuma by his own colleagues were worrying.
"Comrades boldly boast that the abnormal situation and the divisions that characterised the 52nd conference must now be accepted as a tradition of the ANC.
"Kingmakers and bookmakers can only survive when the NEC is divided. Politics of blackmail get stronger when factions are growing stronger than the organisational structures," he said.
He said the league's personal attacks showed "narrow shortsightedness". The league, under Julius Malema, wants Mantashe to be replaced by the former's predecessor, Fikile Mbalula, next year.
Mantashe said the party was slow in recruiting members of other races. "The fact that the membership of the ANC is predominantly African ... is indicative of the slow progress we are making in building a non-racial society."
The party is not only confronted by race issues. "The membership is visibly growing younger and is perceived to be intolerant of the older members," warned Mantashe.
- INDEPENDENT