Which part do you disagree with? … Or maybe you disagree that litvishe yidden were anti-chassidic in the early days? Just read up on the Vilna Gaon’s fiery attacks on chassidus, even putting them in cherem in some of his letters! Don’t just be maflig l’kol davar…
The fact that some litvaks oppposed chasidus doesn’t define the whole group’s history as “used to be misnagdim”.