Why do fascist symbols look so similar to Buddhist ones?

There are two ways to write the character "卍", one is right-handed and the other is left-handed ("卍"). Most Buddhists believe that right-hand rotation should prevail, because Buddhism regards right-hand rotation as auspicious, and Buddhists hold various Buddhist rituals in right-hand rotation. This mysterious symbol, regarded by Buddhists as auspicious and meritorious, was actually used by Hitler, the leader of German fascism, as his party flag. Of course this has nothing to do with Buddhism. The party flag designed by Hitler himself was red with a white circle center and a black "swastika" embedded in the middle. Hitler was very satisfied with his design and believed that "it is a true symbol." He said in his book "Mein Kampf": "Red symbolizes the social significance of our movement, and white symbolizes nationalist ideas." The word ‘Swastika’ symbolizes the mission of the victory struggle for the Aryan people. Later, Hitler also designed "swastika" armbands and "swastika" pennants for his stormtroopers and party members.