Certainly, an exchange backed by Wall Street giants like Fidelity, Citadel and Charles Schwab, knows the differences and won't be misled by a rookie mistake. That cheap misinformation is absurd to be believed by such an institution.
Anyway, Bitcoin Cash does not pump for no reason. It is a consequence of the exchange listing, thus, the short seller is forced to maintain or exit its position. That is what drives the prices higher and higher, it is due to a Short Squeeze. The South Korean exchange also has a volume spike. So there is indeed some relation. Neither they are FOMO'ing, the market does tell what causes it, not simply a pump and dump scheme.