Thought I'd give a quick explanation of how this Fraser Anning guy managed to be a Senator, I've seen stuff around like "he only got 19 votes" which is true but misleading.
The Australian Senate is elected on a proportional-representation system, I'll skip the details, but it is supposed to end up looking like a microcosm of Australian society. Like, if 5% of people vote socialist, then if the system is working well, the Senate should end up being 5% socialist members.
Ballot papers look something like this:
You can either number parties above the line or individual candidates below the line. In this example, numbering that party 1 above the line is exactly equivalent to numbering the candidates under that 1,2,3, then the candidates under the above-the-line 2 would be 4,5,6,7 and so on. 95+% of voters number above the line.
In 2016, we had a rare "double dissolution" election, where the entire Senate goes up for election instead of the usual half-Senate election. This means the number of votes a candidate needs to be elected is half the usual amount. The Trumpist party One Nation got 5.5% of the vote nationwide, but in their stronghold of Queensland they got 9.2%. With preferences, this was enough to elect not just their figurehead, Pauline Hanson, but a second Senator as well. Initially this was a guy called Malcolm Roberts, but after he was caught up in the citizenship scandal, he was ruled ineligible for parliament. That meant that the next candidate on One Nation's list was elected - and that was Fraser Anning.
One thing to note is that being third on One Nation's list of candidates isn't really a sought-after job, because while the party has some support, they're also regarded with contempt by most of the country. You're permanently associating your name with them and there isn't any hope of getting anything out of it - under normal circumstances it would be impossible to be elected. One Nation clearly didn't vet the guy at all, because the first thing he did upon being elected was give the finger to One Nation and announce that he'd sit as an independent, which at the time I thought was pretty funny.
So what led to this was a confluence of factors:
- A double dissolution election, meaning people were getting elected from deeper in the party's depth chart
- An unusually strong performance from One Nation in Queensland, meaning they elected two Senators
- Ineligibility of their second candidate
- Their third candidate, who was just some guy they threw on the ballot to make up the numbers, turns out to be a legit Nazi.
If any of these factors weren't present, this doesn't happen. Anning did only get 19 votes, but that's very normal given his position on the ballot paper. People are voting for parties, not candidates. The story here is that 10% of people in Queensland tried to vote for Trumpism and got Nazism instead.