Not necessarily. It’s genocide because they’re being specifically targeted for their race, religion, ethnic group, or other genetic or cultural characteristics. Which they absolutely are. If you lock the doors at rock concerts and kill everyone in attendance it’s just mass murder.
It's genocide because their culture is slowly getting wiped out. Genocide happens not only in the giant open air concentration camp called Gaza, but also in the West Bank, where the Palestinians are supposedly living in peace with the Israelis. Check out Anna Baltzers documentary about her experience in the West Bank. She went there as a sceptic upon hearing from friends about gruesome stories of how the Israelis treat Palestinians.
Religion is just an excuse to get people on board. This is a territory war, religion is just the thing dividing the two sides, but this is not about religion or race, this is about land and power.