Why did Hisoka want to kill Panthom Troupe's members? I am not quite understand why Hisoka tried to kill all Phantom Troupe member after he was lost from its leader, Chrolo Lucifer. That fight, Chrollo vs Hisoka i think is reasonable because Hisoka always intended to beat a person that more powerful than himself, 


   but in the end he was lost and also confirmed death by Shalnark. 


From the very first Phantom Troupe's Arc, Hisoka seems didn't have that kind of urge to kill all Phantom troupe's member. After his rebirth from that battle between Chrollo Lucifer, he suddenly have urge to kill all Phatom Troupes' member, this is just escalated quickly mood from Hisoka. His first Victim from the group were


   Shalnark and Kortopi, in chapter 357


What's his motive to kill all Phantom Troupe's member ?
The thing is, it's quite hard to interpret or understand Hisoka's motives. So, as to the reason behind Hisoka's seemingly abrupt decision to kill or hunt down all Phantom Troupe members, we don't know yet as of now unless it will be revealed in upcoming chapters. Chapter 357 also surprised me as his decision was so sudden.

What we do know, either from reading the manga or watching the anime, is that Hisoka is someone who gets off or is 'turned on' when fighting someone who is strong, either stronger than him like Chrollo or someone with potential like Gon. This could probably mean that he either has Agonophilia or he's an adrenaline junkie. He probably wants to fight all of the Troupe members, believing it would give him great arousal or excitement since he probably realized they could be worthy opponents after his fight with Chrollo. But again, this is just a possibility based on his actions. We can't be sure unless Togashi explicitly shows this in the future. 

It would be, however, hasty to immediately conclude that he did it 'just because' with no reason or plan. He's not like that and he plans all his moves, as can be seen, for example, in his fights during the Heavens Arena arc. As to his exact plans for antagonizing all of the members of the Troupe, it also has yet to be revealed.