You'll have to provide me a link on that. As clarification, I have read two articles, one from Times of Israel, and the other Ha'Aretz, both left-leaning publications, each making this assertion. Regardless of their possible biases, I looked at the evidence presented, and found it shaky. The quote obviously makes the case, but it's a private statement and has a single, anonymous source. So far as evidence of actual "propping up" I found it relatively minor. It's interesting that his governments haven't really attacked Gaza at all in the past 6 years, in spite of IIRC a few rocket attacks. Clearly Hamas was laying quiet and building up for this. Also interesting to see the Israeli left argue that this is evidence of "propping up Hamas" when they criticized him for too much force for all those years.
But then, they might be correct. I wouldn't put it past Netanyahu. So I can assume, for the sake of argument, that Netanyahu did to some degree prop up, or at least lay off, Hamas these past 6 years. The problem is that Netanyahu is only in office because of Hamas. And now he's taken a page out of Trump's book and is beginning to imperil democracy there. Which makes me even angrier at Hamas, and the majority of Palestinians who put Hamas in power.
If you hadn't noticed, the political right is always empowered by terrorism. One could even say that terrorists and right wing politicians have a kind of sick, symbiotic relationship. The problem, however, in both sidsing this is that it was the Palestinians who turned away from a good faith peace offer that would have given them a sovereign state, and instead almost immediately turned to suicide bombings of civilian targets in Israel. And it was the Palestinians who voted Hamas into power in Gaza later on. Our parents used to tell us that if we got into a fight, it didn't matter who started it, but in warfare it most definitely does. The Pals have chosen war over peace at every step of the way. And because of that, Israel has a head of state who doesn't want the Pals to even have a state, because when civilians are killed by terrorist bombs, people don't elect the party that wanted peace, offered more than anyone thought they would, then walked away with their tails between their legs. They elect the party who says they're going to kick the crap out of the terrorists. And that isn't always the best leader or the best human being.
In case there is any lingering doubt that it is Palestinian terrorism that has been driving this conflict, I did mention in the first paragraph, that for the last 6 years, they hardly attacked Israel, and so Israel hardly attacked them. Now they did this, and they're going to be pulverized. I highlight this for anyone out there who is fuzzy on cause-and-effect, or on who is each of these here.