There has been a heavy selection pressure on American unions by union busting. As a result, the few unions that remain are those that are strong politically. Specifically, those that manage to cling to power in the face of adversity, and resist outside pressures.

Those features help labor relations when things are strained. But it involves very harsh dog fighting that tends to leave both sides wounded.

What kind of people are that? Employers and funded media?

Parents, friends, none of which are employers or media

Parents and friends who have been told repeatedly by media that unions are bad. So it does come back to the media and the financial interests that control either the content or the selection of content that is produced by the media.

Sure, but the whole point of this sub thread was that the view of unions has been inverted/subverted, not just completely erased