And I specify "in Palestine" because obviously for Israel and the US, their role is to serve as a boogeyman. I'm also aware of Israel's history in directly creating Hamas.

I ask this genuinely because I really don't know. Is Hamas really just their operating governing body who also does shit like also run schools, hospitals, etc.... along with having a military arm. Are they just a military arm for Palestine? Or do they not really have any centralized or formal power and act outside any governing structure?

Please keep in mind this isn't trying to demonize them or the Palestinian people, it would just be very helpful to know more of what they're actual role is when dealing with shitty bad faith "BUT HAMAS" arguments.