That may be a perceptual illusion among those who get their information in groupthink echo chambers (like this thread) and various Twitter accounts.
In reality, they aren't any weaker today than 10 or 20 years ago given that the power structure that undergirds Israel (ie US support) hasn't changed one bit.
I don't think so. Israelis are currently super unhappy with the government and terrified of the judicial change. There's been mass rallies and protest etc against it. A majority of the country are being buffeted by centrifugal force of the Haredim and the Ultra nationalists who have formed some sort of unholy alliance. Ben Gvir is literally a meme in Israel (heavily ridiculed and disliked) yet he holds huge power, the Haredim want to row back the secular rights of the state (gay rights, religious freedom, right to insult the jewgod, more money for religious studying etc) and through Ben Gvir and co are possibly able to do that given the assault on judicial powers. Bibi is so under siege he'll do anything to hold power and this is giving rights to these clowns. Meanwhile there is no organised 'opposition' as such, because they all want different things. Most modern secular Israelis want a two state solution, demand one even. (Jerusalem still an issue) Haredim really don't care as long as 'little israel' is religious. Ultra nationalists want to keep settling and harrassing the Palestinians etc, and meanwhile you have people elected under the guise of 'National Security' because people are scared. People are less patriotic, they do their national service but believe less and less in the 'cause.'
The power structures in Israel don't really allow for severe civil unrest, and it'd take the Army to step in for it to get anywhere. [Which they pretty much won't] But make no mistake, the unrest there is huge at the moment, and the power of oneness is diminishing. The law of return is pissing people off, so is support for Russia in general, the government are distrusted and the country is not in a good place. For the first time, people want to escape not go there.
Sure, if they get invaded they will kick ass, but that's a given. Internally it's far weaker.
Edit: I dont think much of this will be in the echo chambers, as it's simply not relevant to them.