Why would countries like Russia attack civilian facilities like hospitals? [closed]

On March 8 2022, allegedly Russia has bombed a Ukrainian children’s hospital in Mariupol, as reported by among others CNN and BBC.

Why would they or others countries in similar situations do that? Is it simply a mistake? Or what would the attacker hope to gain by an action that would presumably be condemned by many other countries in the world?

It seems to increase the chance of other countries actually getting involved, which seems like an escalation. Surely the hospital bombing country realizes actions like this make it harder to stand on the sidelines?