This is kind of amusing to me, because that is not Islam’s teaching. I just spent the last days in an incredibly intense study of the Qur’an.
Islam teaches first that mankind needs to believe–believe in God, believe in Messengers, and believe in the Hereafter. And then that belief should manifest through intentional righteous actions–spending money out of what we love, spending it on relatives, the poor, orphans, travellers, the needy, and to free slaves, for instance, to be good to parents and keep promises, to stay away from immoral behavior like lying, adultery, to be humble. And then Islam teaches that those believers who are doing righteousness should try to enjoin others towards the truth, towards the right, and that they should be steadfast on patience.
Muhammad (saws) himself said that the man who is strong is the one who controls his anger, not the one who shows it.
There’s an example of one of Muhammad’s companions who was fighting a man in battle, and was about to kill him when the man spat in his face. The companion then stopped fighting and told the man to go–the spit in his face had made him angry so he didn’t feel he had a right to fight him anymore.
Islam is so much about denying our “bestial instincts” as you put it, taming our desires. It’s not about hate and killing, as you might have been led to believe.