Dude Hamas on record was created by Israel to have controlled opposition. They exist to keep the area destabilized and in a state of conflict until the people there can be wiped out.
Inhumane weapons such as depleted uranium munitions, White Phosphorous and other experimental weapons are used on the population.
Any one who launches rockets against civilian settlements is a terrorist. That includes the Hamas members, and the IDF (if they deliberately targeted the civilian areas inside Gaza).
thats not how it works, hamas get a pass because they are under occupation and israel refuses to negotiate to end that occupation and for some other reasons. google belligerent reprisal and spend few hours reading then you will understand why hamas are regarded as terrorists by only a small handful of nations.