What I don't get about the whole Delta is why the jab doesn't work on it, which it obviously doesn't.

So, they never isolated the covid virus and the jab is based on synthetic spike proteins that are 'close enough'.

Are the Delta proteins so different that our bodies don't link an immune response to them? But they're still similar enough that the ultra-specific PCR tests can?

Maybe, the PCR tests target RNA sequences, but if the spikes are radically different, wouldn't that affect how the virus actually functions? And it seems to be the same as the other 'variants' except less lethal.

The alternative explanation is that the jab doesn't work on anything, and that lower lethality is a result of most of the population already getting a mild form of covid without even knowing, providing natural antibodies to almost everyone.

The 'Delta variant' rolled out at the exact time jabs did in India; what better way to cover for a failed experiment than to claim base conditions have changed thus requiring a new round of 'vaccine' development.