1.Gunmen: Naveed Akram and Sajid Akram
2.Motive: Possible Islamic State inspired/directed attack against Jewish individuals on a Jewish holiday.
This attack bears some similarity to the attack in the U.K, which took place on the Jewish holiday of Yom Kippur.
3. The Israeli government is pushing for Canberra to use more means to disrupt and dismantle extremist movements operating in Australia that seek to cause harm to Jewish individuals.
4. Special interest groups, think tanks draft bills and the politician would just pick them off the shelf when it suits them.
Politicians are more likely to be stupid than a calculating supervillain.
Finally Islamic State has been conducting attacks against the State of Israel going back as far as 2016. They started trying to kill Jews in May 2014, when there was a shooting in Brussels.