The "mainlanders" are NOT the cause of the property bubble in Hong Kong.
Just as the Nazis in pre WW2 Germany were blaming the Jews for their economic woes, they need not have looked further than themselves for the collapsing economy.
The greed and avarice of the Hong Kong People is the cause of the property balloon.
Don't blame the visitors, unable to defend themselves, for what is of OUR OWN making.
If WE weren't all so greedy, this wouldn't be happening.