Omni txs are BCH txs, just with some extra OP_RETURN data attached (same with memo). The post you just made is a BCH tx. You can't cripple BCH without also crippling memo and omni.
Ok, thanks. So what is the danger of #wormhole to BCH? Just the burning process?
It helps BCH by increasing the number of BCH txs. More txs = more fees for miners = more security for everyone. And burning makes everyone else's BCH more rare and thus more valuable.