Here's a clarifying table: https://en.wikipedia.org/wiki/2018%E2%80%932019_Gaza_border_...
As you can see it does not include "impacted by tear gas", but a thousand palestinians were harmed by having tear gas canisters shot at them. More than six thousand were maimed by gun fire, and as the numbers show, it was deliberate policy to harm rather than kill.
In comparison, as a measure of the supposed militancy from the palestinians, five israelis were injured and none were killed.
Palestinian refugees have a right to return to their land and homes. That's what the march was about.