Are you saying you can't understand plain posts?
To recap, what was said is that it is not credible Ukraine would intentionally attack a building they knew to be housing Ukraine prisoners.
But that is not difficult to imagine Ukraine targeting a location they believe to house opposing military assets. Because they do exactly that all the time.
As to having bad intel. It is far from unusual. Targets are often selected based on leads fed from informants who prove unreliable.
Heck, the US conducted an entire war based on bad intel (Iraqi WMDs).
Last week, the Ukraine side made a broad public appeal for citizens in Russian controlled areas to report details and locations for Russian personnel, equipment, and even suspected collaborators.
The destroyed building had just been repurposed. Some local Ukraine workers must have delivered sheets or other supplies or performed work - and may have been told or assumed it was a guard or troops barracks. Russians might even have directly provided a bogus tip hoping to instigate a strike.
The point is one can float any number of more or equally plausible scenarios aside from Russians could only have blown it up in false flag operation and seeded transplanted Himars parts. Absent definitive proof, we have competing conjecture. Which is the point.
The ISW, MI5, and UDF are making certain claims when there is no certainty.
As to using missiles that are said to not explode. I made no comment remotely suggestive of that. Why mis-attribute that?
And whaaaat? There are missiles designed to not explode and Ukraine is using them?! You are going to have elaborate.