It seems Israel encouraged funding Hamas, according to the NYT:
‘Buying Quiet’: Inside the Israeli Plan That Propped Up Hamas
But what is really puzzling to me is what the IDF was doing at the border on that day. I don't know why those Hamas guys could manage to blow up the fences without any serious firefight at the border. Is Gaza border usually guarded like this?
RE: Israel created Hamas as justification to genocide the Palestinians