I think the biggest reason they hate the swastika is because the second you start looking into it your realize how much history has been omitted and lied about. The second you start looking to where it originates and how far it manage to spread around the world you realize that there was an ancient European people that went all around the world spreading knowledge.

https://www.youtube.com/watch?v=DVu6ryEwF5w&t=11s
https://www.youtube.com/watch?v=9b7bbY9VGuM&t=143s
https://www.youtube.com/watch?v=DJyrpFZwH9A&t=228s
https://www.youtube.com/watch?v=VAUIspPfzqU