http://www.vice.com/read/american-isis-the-domestic-terrorist-fallout-of-the-iraq-war-213
6 Innocent Sikh americans were murdered in in 2012 in a gurdwara of all places in cold blood by racist white american terrorist Mike page wade who was trained in eilte pys-ops.
Other incidents from what I remember are:
9/11/2001 - babir sodhi was killed by a hispanic american who killed him because he thought all those with turbans are not americans and are terrorists. Various Sikhs physically attacked and beaten by racist white and racist black gangs of youths.
7/7/2005 - london... various gurdwara attacked 1 even firebombed by 2 white men in sheppards bush and Sikhs verbally attacked and looked at with suspicion by ignorant whites when muslim terrorists attacked transport system
feb/ 2015 - A Welsh Sikh is violently attacked by with weapons by racist white terrorist ex-british army guy.
We forget that the greatest terrorist threat that Western Sikhs face is racist atheist terrorists ie Latino or white terrorist / extremist and not a muslims.