It's almost unthinkable for Palestinians to join one of these groups, which begs the question, why would anyone do so knowing full well what the consequences are?

What were the motives? If we are discussing Abu Shabab, Abu Shabab, his motive was very clear.

He was once a thug.

The second day he was part of ISIS.

The third day he was in jail.

So he went out, and he wanted to take revenge from Hamas, and he tried to frame it in all the possible ways that he is the good guy, but no one believed him because Gaza is too small, and people, they know each other.

Others, that they joined other groups.

But would they also be expected to contain rogue militias?