The best recruitment tool for Hamas is Israeli violence. Israel kills many civilians but a manageable number of Hamas. There are many Palestinians in prison camps with no trials, Hamas negotiates for their own.
Their calculus is one of triage, they want an effective fighting force to liberate Palestine and not become another West Bank (effectively dissolved with Palestinians treated like cattle). So the need for their organization takes priority over the general population.
They're right wing, imagine how MAGA types would respond to the US being occupied and genocided by China.