Also English is stuffed with sayings like "the straw that broke the camel's back" And "juggling too many balls" and stories like "how the arena became the king of the birds." Using the juggling metaphor, if it took juggling a specific four to run the business with difficulty, and adding a fifth called Brexit caused everything to be dropped it would be perfectly reasonable to blame the Brexit ball. True, you could have got rid of one of the others and juggled successfully, but you would have been losing one of the key four needed.

Blaming Brexit for a demise can be perfectly reasonable, even if it is comparatively small effect, should it be enough to tip the business over the edge.