What is it about Sikhs that lead them to be targeted by some as practitioners of Islam?

http://www.religionfacts.com/charts/shia-sunni-islamhttps://www.youtube.com/watch?v=q7q_LcqbvKI1. One of the Five Pillars of Islam includes going on the Hajj. Watch the documentary video provided in this Learning Module that shows one person’s experience doing this. On this forum, discuss the challenges one may face doing this activity (discuss in reference to economic, social, and political difficulties for a pilgrim), then discuss the reward one gets from this experience. Many people fee transformed by pilgrimages. Post another example of a pilgrimage here and the purpose of doing one (the pilgrimage may be either secular or sacred for the purposes of this example).https://www.youtube.com/watch?v=INIG636SnU4http://www.sikhs.org/2. Sikhs and Muslims are often mistaken for each other by outsiders. In the US, hate crimes against Muslims and as a result, Sikhs have been on the rise since 9/11, the most recent being the Temple shootings in Wisconsin (Reference the links below for a widely publicized incident in Wisconsin). Read the article on the first link and second link below — be sure to watch the short embedded videos in the Propublica article as well as reading).http://www.democracynow.org/2012/8/6/wisconsin_sikh_temple_shooting_latest_tragedyhttps://www.propublica.org/article/sikhs-in-america-hate-crime-victims-and-biasWhat is it about Sikhs that lead them to be targeted by some as practitioners of Islam? Why the mistaken identity? How does this shape how Americans who practice Sikhism are treated as well as how they interact with others who are non-Sikhs?As a corollary, what IS a hate crime and what distinguishes it from other types of violence or criminal activity? Ultimately, what are the causes of religious-based hate crimes and how can these be addressed in US society? In your opinion, how can religious tolerance be advanced or even should it?