The Taliban takeover of Afghanistan and the involvement of Pakistani forces in that changed the ground situation. Rather than any real change in the security status, this may be the factor that might have resulted in the tour cancellation.
Its important for future of Afghanistan cricket that ICC should continue support of Afghanistan. Afghan cricket team has made massive progress in last decade and it will be back to zero if ICC disconnect its support due to recent government change.
No one wants to risk their lives. I support the decision of the New Zealand Board. Because several players have received death threats. In a country like Pakistan, when players receive death threats, the players become emotionally scared and weak.
Absolutely wrong, there isn't anything like that happened at first place. New Zealan officials says they called off tour because there government said so. Details are never shared till date.
So to cut it short. PCB and other small boards have to increase there revenue if they want ICC to listen to them otherwise things will continue to move like that.