It's unfair to blame it on Blinks. It was 2NE1/YG stans who were hostile towards Blackpink at the beginning, for something which was nothing to do with them (a continuing theme in Blackpink's career).
And then YG took the odd decision to separate them out from all other groups, even as trainees, with next to no YG inter-group interaction. I always wonder why. Something must have happened. It gets blamed two ex YG trainees dating, but I think that's a red herring.
Anyway Blackpink have the biggest YG fandom now, and YG has attempted some things, like the Winner DDDD cover, but Blinks are way too twitchy and defensive at this point, and see it all as clout chasing.
Sadly, I think the cycle will continue with the YGNGG.