"Technically true".... it's pretty clear that Israel has, on multiple occasions, fired at UN peacekeeping bases. This is not like "Heat of the moment" failures. These are established sites with UN peacekeepers who had been there for some time.
"Oops, our tanks opened fire on UN forces." Is a weird defense of it keeps happening. Once, maybe, but a healthy military would learn to stop that in the future. Mistakes happen. Repeated mistakes seem like a strategy.