Just accidentally blew up a soccer field ?
Misdirected attacks happen all the time in warfare, and tragically there's nothing in the slightest bit surprising about it. The circumstances around the Majdal Shams attack are still unclear, but it's highly unlikely that Hezbollah would deliberately target a soccer field in the middle of a Druze community in Israel-occupied territory. Most likely it was affected by EW or simply went off course.
So yes, "accidentally blew up a soccer field".