Original Alphys was bad enough (Not very happy her about creating a killer robot to saave Frisk from), but THIS! Killing people for opinions?!!?!?!
As I already said, she wasn’t killing people. YES, the bridge goes out, but it’s meant to be a cartoonishly silly thing. The fall is not fatal. Again, Frisk in canon survives it just fine, and it can be assumed that she and the rest of the guard makes the correct answer to the question very accessible for monsters.
It is meant to be a defense mechanism against humans. And more importantly, it was meant to be a joke. Undertale is full of those. After the seriousness of the previous updates, I wanted something over the top and goofy to lighten the mood. So I went for a Looney Tunes-esque sequence of the bridge going out.
As for canon Alphys… she didn’t create a killer robot to save Frisk? Mettaton was made before Frisk fell, a) to impress Asgore, b) to help her friend’s dreams come true. She simply rigged a bunch of shows to make it SEEM like Frisk was in danger.
But I digress. I wouldn’t actually turn Alphys into a murderer over an anime. My goal was to bring in some goofy antics before going back to more serious matters.