The instant I heard this one, I just immediately thought of the Iraq War testimony that somebody's relative made up to an American committee about how Iraqis were murdering babies in incubators.
Especially with no pictures...in this day and age? There's pictures of everything now archived on the net, and there's zero chance a nation as committed to online propaganda as Israel wouldn't throw them (or SOMETHING) into an article at a moment's notice if they were real. They have apps specifically designed for generating propaganda on social media.
But yeah sure, 1 soldier saying 'they killed babies' is definitely reliable testimony, we all know soldiers, and IDF soldiers especially, never lie.