Snopes's article on the South Africa vs Israel genocide case explains that intent is an important element of genocide. Likewise, intent is an important element of murder.
But we've also invented the lesser charge of manslaughter, presumably so that we can do some sort of justice when intent is absent or difficult to prove, but what was done still seems criminal.
Is there an analogous lesser charge for genocide, covering e.g. actions with the effect of destroying, in whole or in part, a national, ethnical, racial or religious group, as such? Or is that a yet-to-be-named crime? Or is it not actually rightly a crime somehow?