Comment by berdario
For sure, yesterday's was a terrorist attack, since it indiscriminately hit civilians (multiple children, healthcare workers, etc.)
That said, before more people jump on the rethoric of declaring a specific entity terrorist:
The decision is usually made by your state's authorities, and depending on where you live, Hezbollah might not be considered a terrorist organization, or its military wing might be considered terrorist, but not Hezbollah as a whole (like in the EU).
Since we've seen medics among the victims, it's pretty clear that this was not surgically targeting a the military wing, and thus few people would dare claim that this was targeted against terrorists.