"Hotel cabal" is bullshit. Slightly less bullshit than Uber's "taxi mafia", but still a steaming pile of bovine excrement.
AirBnB is a multinational corporation. It's displacing not just large hotel chains, but also all the local legal forms of short-term accommodation - small hotels, hostels, motels, BnBs, etc.
It really bewilders me that people have fallen for the same reality-inverting marketing propaganda not once, but twice. AirBnB and Uber aren't underdogs fighting cabals, they're SV-money-pumped cabals fighting small local businesses.