Just a minor point - they’re not going to get dragged out of a Merkava IV once they’re inside unless they forgot to lock the hatches. Technically, that thing is probably the most survivable tank in the world at this kind of warfare, which included angry terrorist asshats trying to get into the tank.
I don’t know anything about opening a tank entry/exit hatch. But, I imagine both sides carry small explosives to blow it off.
But, YES, you are correct, the tank attacking soldiers would have to get their hands on them first.