Sounds similar to the @auschwitzmuseum account, however we cannot forget or play down what happened during WWII and the holocaust. I am sure you're not suggesting we do.
Posting pictures of 'just' children is perhaps the wrong approach here, the above covers people of ALL ages who perished and their stories. I would also assume they have permission from family members (where possible) to share these stories and photos too.
I actually think there will be a time and place to publish these stories. Hopefully we can say 'Never again' and actually mean it.