How is it any more ridiculous than believing that guy in the audience wanted millions dead by nuclear weapons ffs
That is what that bloke wanted, so he was right to point out the consequences of what he was saying.
Though that said, this is the one thing that truly annoys me about Corbyn. He has had literally decades to come up with a better answer than the ones he gave last night, and he refuses to do so.
He could have pointed out how "the button" works (ie: that as our SSBN are out of radio contact for most of the time there wouldn't be any button to push, that's why they have those letters of last resort) and that if we were ever the victims of a nuclear attack, London would almost certainly be the target and so he would be dead anyway; that the fact they are believed to be at "days" readiness rather than hours means it isn't something that you just push a button and off it goes, defending us all; that its not a weapon we could ever (or would ever) use against rogue states like North Korea and Iran (the Trident missiles have probably between 4 and 6 warheads per missile, with yields as big as 100 kt, so launching one would probably devastate each country
and substantially affect (to the point of irradiating much of their population) regional allies / rivals like Saudi Arabia, the Gulf States, South Korea and China), and that launching them after such an attack would be in the certain knowledge that the people responsible were all safe miles underground and the only people you'd incinerate were millions and millions of innocents. He could even have pointed out that, despite Tory rhetoric, the only set of circumstances they'd launch them is as part of a global thermonuclear exchange that would guarantee the deaths of 99% of the people in the West - which would be an admittance that their use as a deterrent had utterly failed. If it got to that point where we realistically going to launch it wouldn't protect us, it would just avenge us.
Instead he just gave his stock answer, which just walks straight into the trap of "well, you wouldn't protect us" and which doesn't in any way explain what he wants to do in a way that most people, raised on a false idea of what a nuclear exchange would be like, could ever accept or understand. (edit) To my mind this is almost unforgiveable, given how much work has been done elsewhere by him to explain what he wants to do and the vast likelihood this will come up at every interview, debate, question from the public etc.