I do not accept your opinion, or assertion, that "harming civilians is the norm" nor the implication that normative violence serves as any kind of license or justification.
Harming civilians is absolutely the norm in warfare through all humans history, all/most nations including likely yours practiced it in multiple points of time. Its also norm pretending that its bad while actually practicing it.
The question was specifically about genocide allegations, and blind trust in UN sub-orgs reports.