Its too difficult to predict if he wouldve or not. He had Tabun, the deadliest nerve gas agent that also couldve changed everything but he didnt use that either. Also Germany didnt fight to the death, they surrendered. I can only imagine how much worse it couldve been for everyone had they fought to the death.
Hitler was under the impression that the Allies also had nerve agents and would be able to produce them in far greater quantities than Germany if they were used. Also, it is suggested that Hitler's experiences in WW1 made him reluctant to use gas and gas is a messy weapon that often gets you as well.
Germany certainly fought to Hitler's death and there wasn't much left unconquered by the surrender except bits of occupied territories like Norway and Bohemia. Given that the writing was on the wall for many months, I think it's reasonable to suggest that they fought to the death.
The world is full of people who are either deluded or charlatans. Rainer Karlsch may well be both.
"The only problem with all the hype is that the historian has no real proof to back up his spectacular theories.
His witnesses either lack credibility or have no first-hand knowledge of the events described in the book. What Karlsch insists are key documents can, in truth, be interpreted in various ways, some of which contradict his theory. Finally, the soil sample readings taken thus far at the detonation sites provide "no indication of the explosion of an atomic bomb," says Gerald Kirchner of Germany's Federal Office for Radiation Protection."
Neilster