Minzy is innocent.
Dara was always supportive.
Bom just said to Blackjacks something in the lines of "don't stop being Blackjacks and become Blinks" which is understandable. But correct me if I'm wrong.
CL was the only one who posted the shady comment. But again she liked a picture of Jisoo.
In conclusion, I don't think 2ne1 hate Blackpink, it's just that fans exaggerate a lot.