Gazans celebrate an 8-year old's injury

A tiny throwaway paragraph in YNet's coverage of Saturday's Qassam rocket attack that injured two brothers, with an 8-year old severely injured in his legs:

Within Gaza, terrorists celebrated their "success", as gunmen from the Al-Quds Brigades fired in the air and broadcasted victory messages from mosque loudspeakers.

From this single sentence we can learn three things:

1. Palestinian Arab terrorists remain depraved as ever, celebrating the pain of innocent civilians.
2. Islamic Jihad's morale must be amazingly low, as they continue to lower the bar of what they consider "victory" just so they can have something to celebrate and not feel like total losers.
3. Mosques in Gaza are used, today, to promote terrorism.