“Olive branch” and “adversarial” are incompatible. The press views its role as that of adversary, it is to advocate for the positions and persons it favors. It views Trump and his supporters as enemies. There is nothing irrational about this, it is human nature at work.
No, the MSM views itself as an adversary of those who do not support the liberal agenda and an advocate for those who do. The MSM has been politicized for a long time. It has only been fully revealed with the advent of the alternative media. For me, the watershed event was Drudge disclosing the Lewinski affair, a story the MSM had been sitting on hoping to cover it up.