Tennis Australia behaved idiotically by given Djokovic inaccurate information concerning entry to Australia.
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Because Djokovic received incorrect information, you think “he is a danger to Australia’s border security”.
No. That isn't my position at all.
The primary reason he's become a danger to border security is because of the decision made by the Judge on Monday, that basically overturned Australian federal border policy. Unfortunately, unless the Judge reverses that decision (or a higher court does) the only practical way the federal government can take back control of that policy is to take action that invalidates the Judge's ruling.
The secondary reason is that allowing Djokovic to stay overturns the fundamental principle of our border policy - that the Australian government absolutely has the power to decide who comes here and under what circumstances, and that nobody else can make that decision, and that no exceptions are made.
Most of this isn't Djokovic's fault - although the fact he lied (and he has admitted doing so) on his border entry form, does mean I can't say none of it is.