These lyrics don’t seem to have anything to do with the ANC.
Furthermore, I can only Google one reference to your assertion, here, and it seems to be considered an UL, even by the person who’s making it. Whereas this site says:
[continue hijack] I thought the song is a general condemnation of colonialism using Cromwell as a metaphor for British military might. The “Oliver” of the lyrics seems to be very much the invader/oppressor/conquerer rather than fighting against the invaders or for freedom.[hijack on hold]
We have a close human friend named Kevin. That could get confusing.
Lovely names all. The final decision will be made tomorrow.