From everything I've heard, still isn't clear to me who started it.
Who started it? The Lebs who attacked the lifeguards and were calling the Australian women 'whores' for being in bathing suits, perhaps. The gang rape 'habit' that the muzzies seem to have brought with them to Austalia, perhaps? The 'ratbag' culture that chooses not to assimilate but rather to impose sharia law in its new country? Just some guesses.
I think the MIddle Eastern gangs started it. Not terrorists, but common criminals.