A 69-year-old white French gunman who opened fire at a Kurdish cultural centre in Paris killing three people told investigators he was racist, a source close to the case said Saturday. The shots at the centre and a nearby hairdressing salon shortly before midday on Friday caused panic in the trendy 10th district of the French capital, a bustling area of shops and restaurants that is home to a large Kurdish population. Three others were wounded in the attack that the gunman attributed to his being “racist”, the source said. He was found with a case loaded with a box of at least 25 cartridges an…