I'll keep it short and simple.

The jab causes jabbers to have antibodies specific to the OG strain, which is why it never worked. Covid had mutated by the time they came out.

...but the BU variant is OG strain made more virulent. Correct me if I'm wrong, but isn't the OG strain the only strain jabbers have antibodies against?

If so, then this variant is specifically to target us.

They can then say "See? The jabbed were protected while the unvaxxed got sick. Get jabbed."

What say you fine ladies and gentlemen?