Since the greater majority of Sikhs in the US are hardworking, law abiding citizens, the mainstream media isn’t interested in them.
It’s call “liberal media bias” (LMB) (aka “Lots of Media Bias).
I meet Sikhs often in my work,and they have all been hardworking and respectful,yet the youngest are showing signs of the less desirable traits of modern America.The media,schools,and government ridicule the traditional family values which the Sikhs have in common with conservative Americans. I have also been dismayed and exasperated by those who insist “all towelheads are the same”.