It's probably a sign of the times, but "Zulu", is viewed by many in the US as politically incorrect, well armed white guys shooting spear armed natives. That's probably why it is not as visible on the networks as it once was.
Every time I watch "Zulu", I try to imagine what the defenders must have felt, especially before they actually see the enemy, knowing that a much larger force had just been eliminated.
I'm not sure whether the Zulu's did, or did not use the banging of the spears on their shields during the approach, as the film suggests, "Funny, sounds like a train.", though from all accounts they certainly did before going into action. It makes the hair on the back of my neck stand up when ever I hear it.
They were the tools of Empire, as the "Hookey" character said, "Did I ever see a Zulu walking down the Kings Road." They must all have asked themselves, before the first shot was fired, "What am I doing here?".