Yes, there were militant groups like the Irgun, and some of their actions were wrong but they weren’t the face of the Jewish movement. In fact, they were condemned by mainstream leaders and shut down once Israel was founded as I stated above.
Hamas, on the other hand, was elected and openly calls for wiping out Israel. They don’t just use violence they celebrate it. That’s a huge difference.
Well, they can say anything they want. You, guys, also had a dude 2,000 years ago. Said a lot of things. By the way, only few locals believed him. So let them talk. Unlikely to succeed. But they can keep up the appearance of vigorous activity, leeching off the local population for a long time. Hamas, in particular, won’t achieve independence for Palestine.