Killing a man by mistake and after collecting the Diyah, the judge decided only the half is to be paid

Q 3: The traffic police stated that the accident was definitely the other man's fault, because he was driving in the opposite direction of the road. There was something ambiguous about the road. The other driver was a Buddhist Thai who was driving a large van with an insurance policy. He did not even try to avoid the accident, whether by using brakes or deviating away from the other car towards the right side. We are not entitled to ask for Diyah (blood money), because the accident, in my viewpoint, comes within the ruling of involuntary manslaughter, besides the other driver is not a Muslim, and is not entitled to be given charity. If we forgive him, will we be rewarded?

A: If the reality is as you mentioned and you forgive this driver, you will be rewarded in sha’a-Allah (if Allah wills).May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.