1. Journalists do not exist in a vaccum; they influence each other just as much, if not more, than they influence their audiences.
2. This is a discussion about the elite, not about the rank and file. Senior editors, anchors, producers and directors of national and/or multinational media outlets are able to reach tens of millions of people through their organizations. The majority of the major outlets in the western world, even though they may disagree on superficial issues, have adopted a liberal stance. Breitbart, RT (which isn't western but has a strong international presence) and to a lesser extent Fox News are exceptions to this.
It is beyond any doubt that academics (faculty members, ph.d. holders, professors etc.) are significantly
more likely to identify with liberal or left wing movements than they are with mainstream conservatism let alone anything on the independent right. This problem being more pronounced in the US and in the social sciences and humanities is particularly worrying since it is people with a background in these subjects who tend to end up in positions of political power. Moreover, we know from historical data that it hasn't always been this way - which is evidence left wing views are not somehow more intellectually enlightened (a claim often made by those attempting to justify the effective monopoly that the left has over higher learning institutions).
You're drawing a distinction where there isn't one: cosmopolitan liberalism is both an economic and a social doctrine. Multiculturalism (as it is understood in a contemporary context) is an inevitable consequence of governments and powerful corporations flooding labour markets with foreign workers. The moral rationale which is used to justify it (inclusion, tolerance, diversity etc.) exists merely to facilitate the economic model. So far as I can tell, there is absolutely nothing historically unusual about elite classes using contrived moral codes to promote their own financial interests in this way.
This would only be true if a) I had claimed that the elite was exclusively liberal b) the Murdoch press didn't exist on the liberal spectrum. You apparently aren't aware, for instance,
that the Sun openly supported Blair's rise to power or that the Mail's Grieg advocated for the United Kingdom's continued membership of the European Union.
The majority of politicians in national legislatures in western societies adhere to the values of cosmopolitan liberalism. The fact that Merkel may have attempted to soothe certain voters by pretending to oppose mass migrant economics and multiculturalism is irrelevant.