I didn't defend the alleged behaviour when commencing the thread, but if I may so politely, many didn't (and don't) agree with his stance on some contentious social issues.
But he shouldn't have received a cream puff on his face (despite it being somewhat of an Australian/UK tradition, reading history) or had his home daubed with eggs and toilet paper, if that's what those two items were.
However the question remains: how much 'tolerance' do some individuals (not referring to that gentleman, as don't know if he participates or funds it) aligned with the view to which you refer show when they publicly insult Catholics and other Christians at public rallies? This behaviour is also offensive to Muslims and many others who have a religious belief, who in total are the majority in Australian society.
If this gent received unwanted correspondence, he's not alone, but some occurrences are never publicised given to do so may encourage idiotic copycat individuals.