Why do Cardi B and Nicki Minaj hate each other?

Cardi B and Nicki Minaj dislike each other, it started when Cardi said Nicki liked negative posts about her daughter on Twitter. Nicki responded saying Cardi doesn’t write her own raps and pays radios to play her songs. Cardi then called Nicki a vulgar term on live TV during the VMA’s but the beef climaxed at a New York fashion party when the rappers fought each other and security had to pull them a part.