The post you are replying to literally is playing the finger pointing game. They level accusations right back at spark fun.
I have zero skin in this game, and personally think the right move is for Adafruit to simply say, "We wish Sparkfun the best of luck" and move on, but the post you are responding to is clearly looking for a public fight.
> "We wish Sparkfun the best of luck"
This would mean admitting the allegations are 100% true and harming their business even more with the risk of losing it all in worst case. Now we can assume it's not as simple as SparkFun makes it. It's a dirty situation, but necessary, and justified if they are really a victim.
> but the post you are responding to is clearly looking for a public fight.
SparkFun started the war, AdaFruit seem to only defend here.