User blog comment:Piyush Banerjee/Shin DxD 2 discussion/@comment-32252462-20190327130550/@comment-2208155-20190327212718

Vali character was less developed in that moment..

He said that because he wanted one angry Issei to fight him.. Fight the red dragon was his obsession not kill people without reasons..

Despite he joined the Khaos Brigade he never was evil.. He  never made enemy of the 3 factions or another mythologies attacking them..