Sorry to stick up for the manufacturer on this one, this is probably a traditional character where the boot was designed. The Nazis adopted it sure, and made it very infamous, but it has other history prior to being adopted by Hitler and the Nazis for their symbol in WWII. I (think) the Nazi version used “S” designs, but it was in Asia for a long time before the Nazis adopted it.
I believe the version here is traditionally “Z”s in design, rather than “S”. If I have that backward, sorry.
I see it occasionally here, don’t even pay attention to it much anymore to tell the truth. I have seen it in various countries in Asia, never associated with Nazis.
I realize that the swastika symbol predates Nazism by centuries, perhaps millennia. However, its current meaning dwarfs everything in the past.