The swastika, if that's what it was, has a long past. It was popular long before Hitler adopted it and it became a hated symbol. They appear in Budhist and Hindu religions. I remember when I lived in Japan about 30 odd years ago, that the locations of temples were indicated by a reversed swastika.
I would also add, as a Filipino resident of 25 years, that such incidents, killing a friend after drinking and getting into an argument, in the Philippines are quite common. I know personally of two cases. In one case, the brother of my now ex-wife (my b-in-l) was drinking heavily with friends. One of his friends pulled a ring off his finger and, horsing around, wouldn't return it. He went home came back with a gun and shot his friend dead. I was even asked to pay Php50k blood money to keep him out of jail.