roastedDeflator, 6 months ago

You are correct. He has served the UN since 1992 and he did not step down for Yemen or any genocide. It is just his retirement letter.

Also this is mentioned in the article:

He was criticised for posting support of the boycott, divest, sanctions (BDS) movement and accusing Israel of apartheid – an accusation which he repeated in his retirement letter.

and this is the twitter link to the retirement letter