We do not know exactly what these guys did. They showed up. After that, it is all speculation.
However, if SWAT officers are a few minutes away and they don’t respond to multiple shots fired at a school, we would be LIVID. Doesn’t matter what department they care from.
My argument is not that they responded. The reason given for suspension is they didn’t let anyone at their agency know they were responding. That’s a legitimate reason.