The zandalari as a kingdom have never actually been a hostile power to the alliance. In classic they were friendly and helped deal with ZG and wrath they helped deal with ZD.
Only Zul’s exiled faction has ever been at odd with the alliance both in cata and mop and they didn’t represent the kingdom as they were in exile and there actions went against the will of the kingdom as we see in zandalari when the mogu show up saying there in charge and get beaten out.