Keep in mind that Fairy is half black, so BLM is very important to them. Salem's lack of reaction might've been the straw that broke the camel's back regarding a number of things between the two we don't know about.Isn't because Tearzah's lack of reaction to BLM? Losing friend for politics identities sucks but as someone like Tea, it's better for FT and her art progress, I had no idea they were best friends, we never seen them talking on social media and the only thing tea did to FT is stolen characters design.
It was an ouroboros of theft. Sometimes Fairy stole designs from Salem, sometimes Salem stole designs from Fairy. The usual in that type of circle.FT actually stole the design from Tea, if you're referring to primrose. FT just deleted old art of her primrose knockoff to make it look like the design is much older than Teas.