Or the parasite makes them do this so they become easy pickings for a bird, to further the life cycle of the parasite.
The Americans could learn a thing or two from them
Bullshit, this is done by a bird.
Or it was the Red-backed shrike (Lanius collurio)
No they are the simp bees when they found out the queen is fucking other bees they commit seppuku....
I wonder how you assumed that the reason is that, and not "I'm in so much pain I want to kill myself"