Strikeforce is on a decline. Fighters in the organization have a hard time finding sponsors, etc.
I'm sure there's pressure on Rousey to market the fight, build hype and try to convince people Strikeforce is relevent. Not just for herself but for everyone else that fights in SF.
Its pretty obvious Rousey doesn't hate Kaufman and has no reason to want to choke Kaufman until she dies or whatever..
Its just Rousey trying to market strikeforce and make it somewhat relevent to gain interest and make it easier for fighters to find sponsors, etc.
She's just trying to put strikeforce on the map & if some empty words and threats will do that, why not? That's all it is. Marketing.