Nicki tried to play in Megs face with that "stay in your tory lanez" line. All the hype around PF2 must've made Nicki think she could get away with sonning Meg like that. But Meg made it clear she was with the shts, bodied Nicki with that "Megan's law" line, and hasn't looked back. So yea, no one knows why Nicki decided to go at her from the start.