I live in India where swastikas are legit religious symbols. How did they go from those to symbols of violence against humanity?
This has been asked many times. This thread has some answers: http://www.reddit.com/r/AskHistorians/comments/1re1hy/why_did_the_nazis_pick_the_swastika_as_the_symbol/
Some additional discussion here: http://www.reddit.com/r/AskHistorians/comments/22o0ob/what_did_germans_in_the_1930s_think_of/
And some more threads here: