Krishna is neutral but He reciprocates according to how different persons approach Him. For instance, in Bhagavad Gita He describes, ye yathā māṁ prapadyante tāṁs tathaiva bhajāmy aham (BG 4.11) according to how people worship Him similarly he reciprocates with them and worships them. So those who worship Him with hate, enmity such as some of the asuras wanted to kill him then he reciprocates with them and kills them and those devotees who worship Him with devotion and with faith, He reciprocates and He protects them and He gives them His love since those devotees are giving their love to Him. Someone would say well, although He is answering the prayers of the respective people accordingly but one person is getting slain by the Lord and the other person is getting embraced. But then in one sense is it still equal and this the Lord is absolute even if He kills somebody they achieve liberation. So no matter what benediction he gives to someone even if it appears materially to be harsh ultimately everything He does is all good and thus no one is a loser.
His Holiness Jayapataka Swami Maharaj
1985, October 1st, SB class @ New Talavan, USA