Well it's pretty evident that other than the Sydney 08 test which riled up some Australian fans, the other fans seems to be more upset about the behavior of Indian fans online and the crowds at the cricket grounds. Despite the fact that I have borne the brunt of a lot of these Indian fans online, especially after every World Cup game for obvious reasons, I will still say that this is not exclusively an Indian problem nor does India have some sort of a monopoly on obnoxious and unsporting behavior from ultra nationalistic fans.
Indian crowds are extremely unsporting. A packed ground will be in utter silence if the opposition scores a boundary or picks up a wicket. Even the new India poster boy Harsha Bhogle remarked that someone had set the volume to mute when Rohit Sharma got out to Amir at Kolkata.
But this is not just the Indian crowd though. The Bangladesh crowd is exactly the same. But is it just a subcontinental problem? Not necessarily. I was at MCG during the World Cup 2015 final and although Australia were well on top, every time Grant Elliot would score a boundary, a bunch of Australian fans nearby would be cursing and abusing him from the stands.
The problem here is not about India or Bangladesh or Australia. The problem here is a sense of nationalism and national pride where you feel you would be disloyal to your country if you appreciate a good performance of the opposition, or you already have such a sense of superiority that you are blinded to the excellence in others. That prevents you from every appreciating anyone from outside. This is is at the crux of the problem here. Not saying everyone is like that. But this is a significantly large proportion of people in any country. India being a nation of 1b or Bangladesh being a nation of 200m, that proportion translates to a large number of people wearing their nationalism on their sleeve.
A good example would be on this very forum, there are a few Australian fans who will never ever appreciate a cricketer from another team or blindly support the sometimes obnoxious behavior of their teams or cricket boards. Same is true for some Indian and English fans. When weldone comes here and says something like BCCI is the king of the jungle where the other animals (teams) reside, or Kirkut claims everyone else is just jealous, or the Australian fans looking the other way when Hazelwood asks "who's the ****ing umpire'. That's just national bias clouding their sense of judgement.
The other teams don't have a significantly large proportion of fandom here for a decent sample size.
Having said that, the reason the unsporting crowd behavior in India or Bangladesh gets magnified is because those countries are not multi cultural/national.
Australia has a significant population of Kiwis, Brits and South Asians. So in a cricket game, you will have a decent proportion of these fans showing up at the games and cheering for their team, along with the Gobs and the Burgeys, thus creating a healthy and sporting atmosphere. South Africa has a lot of Indians. England has a lot of South Asians as well.
The South Asian countries obviously do not have such a mixed population, hence the fandom you see at cricket grounds are one sided.
So to go back to the original point, the behavior of Indian fans is what seems to tick off people here. Yes their behavior is dreadful, but it's absolutely unfair to just single them out. Human beings in general have tribal instincts, but unfortunately for a lot of people, that's all they have.