Thanks for bringing this to our attention! I was (mainly) responsible for picking hats this year.
When this hat was first introduced in 2014, there was a comment on the Secret Hats post from that year mentioning this concern but it doesn't seem that any action was taken to correct it. When I looked into the past for hats to use, the trigger for this caught my attention but I did neither notice the symbol/nor recognized it. Apparently, in 2014 several hats were designed after real hats and this was one of them.
This is my fault and I apologize for causing hurt. To mitigate this, our wonderful designer, Kalina, has updated the hat to bear an icon that reflects the feeling of welcome it's intended to convey - a heart. This is live now:
I hope you all enjoy this new version of the hat and can continue to have fun with the Winter Bash festivities this year!