There's nothing so formidable as an enemy who has nothing to lose.
Relevant aside: Few know that not only did we British invent concentration camps, we more or less wrote the playbook on suicide bombing. I've seen rare and disturbing Home Guard training films. It was not all "Dad's Army". One tag-line was "You can always take one with you".
Anyway, the point is not about improvised explosives, and women using prams to walk right into a group of occupying soldiers, but about how a struggle changes once the underdog realises they really have nothing much left to lose.
Since Hitler's general staff believed Sealion wouldn't work it was never attempted and so although "You can always take one with you" was considered it was never actually used.
There were guerrilla units established who had more targeted training (ie. To assassinate collaborators in any puppet government) but that wasn't necessarily a suicide mission and it wasn't general, the "you can always take one with you" messaging would have addressed the general population.
He hasn't destroyed Fable, but he's drastically reduced its value to DC.