Not defending the murder of civilians, but the problem Palestinians find themselves facing is that:
1-It's not just taking their lands. Every year West Bank Palestinians are murdered or kicked off their lands to make way for Israeli settlements, with either tacit acceptance or out right support from the Israeli government, and the blockade of Gaza doesn't need to be explained.
2-Peace isn't working. The PLO renounced violence and 100% dedicated to peaceful efforts. And the result? The West Bank is now a Bantustan where Palestinian land is being forcibly taken every year. The blockade of Gaza started before Israel's popular excuse of Hamas taking charge. Israel wants Palestinians to suffer, so until that changes some Palestinians will obviously choose violence. This is just an inevitable result of peace not working.