There has been another shooting with mass casualties at a Sikh Temple in suburban Milwaukee. Details are still murky, but you can get up to speed by following the link or turning on cable television. I won’t make any speculation about motive. But I will give you a little information about Sikhs.
It’s the fifth-largest organized religion in the world and it dates back to the 15th Century. It is totally distinct from Islam.
You can read up about their beliefs here.