Incredible story: Left-bending gets partial debt?

Hello! Brief description: A relative stands on a road, wants to turn left and wait for the oncoming traffic. Behind him a queue forms. The whole is inside, normal, 2 laney road. At the moment he finds a gap that is large enough, he drives off (has flashed continuously) and then a motorcycle drives him full into the side, which had overtaken the snake. After a long time back and forth it looks now as if my relative is getting a partial debt! He would have I don’t know. I didn’t learn it that way in my driving school. In the middle of the city, on a busy road, I want to get across quickly as a left-wing turner, clear, without endangering someone and therefore also myself. In the situation it is forbidden to overtake, if it is clear that you want to turn and only wait for the oncoming traffic. Re The whole thing becomes more dramier, because the Mercedes (10-12 years old) is an economic total damage, the insurance of the motorcyclist paid the most part, but wants to pass a partial debt on my relatives as said. He regrets now that he does not have any traffic protection insurance.