Honestly, I think Australia is pretty safe. There are some pockets in the major cities where Muslims are common, but not that many.
Overall, it’s a small proportion of the population - but when there are people in that population who want to kill you...
If this is a islamic terrorist attack (I assume it is, but I’ll add the if), it’s the first real Islamic terrorist attack on our soil. The US has had them before. I think that overall we are probably a little safer than the US from these things in Australia.
The bigger threat has been things like the Bali bombing.
I was checking immigration in Au and NZ it was tight, not accepting anyone with ties to terrorists or had any background like that...so I am somewhat surprised, since the US has the open border.
Unfortunately Australia’s Muslim population has grown larger throughout the years. During the Israel/Gaza conflict some Muslim scum were threatening Jewish school children on a school bus in Melbourne..Muslim roaches are all over the place