I'm from Iran . I'm going to emigrate to Australia . are Australians friendly with Iranians or not?

Speaking for myself, you'd be very welcome. However there are some ignorant people who fear people from other countries. I think this prejudice might be found everywhere. But there are many people here from different places. and backgrounds. In cities like Sydney, Melbourne, Adelaide and so on you'll find other Iranians, and in some mosques, bahai temples, christian churches, whatever you want to relate to. Good luck, my friend.