This sounds like the brochure of a company that makes vaporware. Your weird examples of Houthis or Sindoor do not apply to Israel, a country with missiles and an Air Force that far exceeds India or Turkey or Saudi Arabia or Pakistan. In addition the Israelis have access to unlimited Western intel , EW, radar , weapons etc. I am not going to debate your silly nuke talk.
Do you think a Pakistan that fights Israel will get IMF/World Bank loans ? Or its elites will get visas to the most-desired West ? or GSP trade status in Europe ?
Do you think India and the Taliban will sit quietly while Pakistan is gallantly fighting far away Israelis to protect far-away Saudis ?
The target of this pact is not Israel.
You are right to apply scepticism and scepticism is always healthy when change is afoot. I'm also sceptical...of just about everything and everyone. This pact is no different. I hope my lingering concerns are proved wrong.
The situation of Israel remains more precarious than folks think, and it always will be, due to simple geography. They are constantly on the front foot in the region for good reason. Theoretically, it takes one single concerted assault, timed properly, and by an overwhelming enemy, to overrun their nation. This has been their status since their inception.
Indeed, Egyptian friends will tell you that they came perilously close to this in the Yom Kippur War and on one or two other occasions. You will no doubt know of PAF's consistent participation against the Israeli forces in this and other wars fought between Arabs and Israelis. In other words, we know each other well as (extended) regional rival powers already.
The issue of Pakistan's ongoing antagonism towards Israel is a logical move, given Tel Aviv's open courting of our existential enemy to the east. Historically, Cold War loyalties may have limited the Isr-Pak rivalry but those limiting factors are long gone. We don't need to reiterate the reality that Israel is presently one of India's biggest arms suppliers and is certainly the supplier of the most advanced strike equipment available to them.
Pakistan is left with no choice to be honest, other than to find a way to continue to confront Israel, if purely to thwart their direct assistance to Delhi.
On this subject of confrontation, we have seen what happens when an UNPREPARED nation is forced to directly fight against a regional hegemon ahead of its chosen time (I maintain that Iran was hastily forced into the situation it is currently in due largely to Hamas's ineptitude). Pakistan is avoiding the same trap by choosing the long road, rightly so imho.
I'm sceptical but also very hopeful. Much can be achieved in the coming decades. It is a difficult game though, as history's greatest games always are. Now is the time to keep making moves strategically, not to tip the board over and scatter the pieces.