Hamas is considered a terrorism organization by Canada
Doesn't matter. Telling medics who they can and can't treat is a war crime.
There's a reason we have international rules and standards for conflicts, and a huge number of them have to do with how medics and aid-workers operate. If you start perverting that, then medics dies and war gets worse than it already is.
Similar things apply to how civilians and prisoners are treated, and for the same reason: mistreat non-combatants and you can expect the same in return. When the Americans brutalized Iraqi combatants, it resulted in American troops and civilians, both in and out of conflict zones, dying. All because of Bush's "You're either with us or with the terrorists" absolutism that not only didn't end the war sooner, it wrecked American soft power for the following quarter-century at least.
War is awful, but at least it can be less awful is basic rules get followed. This is one of them.
Israel is finding this out the hard way, just like the Americans did when they flushed their reputation after the second gulf war. Netanyahu probably knows this, but because he's not the one who's at risk he's happy to put targets on doctors, aid-workers and the Jewish diaspora world-wide to save his cowardly political skin.
No one says Hamas isn't a terrorist organization, but that's not what's being argued, here, and if Netanyahu hadn't shot his wad Israel woud enjoying broad international support and sympathy right now, with help and aid and assistance and lot of goodwill. But if he did that, he'd probably be unelected by his own supporters, because his staying in office and out of jail on corruption charges depends on the support of Israeli neo-fascists.