Only if you work in a very poor workplace. If your workplace HR has this attitude you should have not joined the company in the first place. You should escalate to the next higher up if the manager in question is not being correctly handled by HR.
Or a standard workplace with shit legal protection of employees (which applies to pretty much every non-union US shop). The purpose of HR is to minimise company liability, when the best and simplest way to minimise company liability is to fire employees making waves stat, that's what they do, because that what they're employed to do.
