The question that is to be answered here is what the necessity of one avatar was after another and what were the reasons for that.
And there is proof of what is being said. We know that enough has been written about anti-kshatriya behavior of Parashuram; but we must remember that He was an incarnation of God and God is ALWAYS unbiased towards all humanity, why for that matter, towards His entire Creation. So let us accept this, God is unbiased, he can be neither anti Kshatriya nor Pro Brahmin, as it is being made out nowadays by Dharm gurus and their followers everywhere in Hindu Society, including Social Sites.
1. In ensuring Vaanars are accepted as Humans by existing Kingdoms.2. In roping in Brahmins and Dharm gurus to end atrocities on females.