The support for Hamas in percentages still has 2 digits. Smuggling and shooting thousands of rockets requires more than a handful of people, and so does organizing hundreds of terrorists hyped on Captagon to storm the border.
Israel is not the police or governor of Gaza. They are an enemy, and so a lot of their property was damaged or destroyed - a fair play in a war to restore the deterrence. If there are enough combatants in a #Farfur school then yes it’s a legitimate target, and cancelling this option is basically telling terrorists (who don’t care about your laws) to use schools as much as possible.

By the way, one of Sinwar’s bodyguards had an ID claiming that he was an “UNRWA teacher”. Possibly fake ID, but it will not be the first time combatants were found to receive salaries from UNRWA.

https://www.timesofisrael.com/poll-support-for-hamas-on-the-rise-among-palestinians-now-double-fatahs/amp/ 

 How could you possibly trust any public polling data from inside a dictatorship? 

 The same way you trust an aid organization inside a dictatorship.
By the way, the statistics are even more worrying in the West Bank where they have more freedom to speak their mind.

Good luck trying to establish the first liberal-muslim democracy in the region… 

 Try being less tribal