When modern citizens cease to be religious they do not cease to be moral, they still have the same moral mind and the same moral impulses and needs that they used to channel through religion. They still have the same need for a moral identity, for a moral north and to signal that identity and their readiness for cooperation to others.
What used to be done at mass or at religious festivals and rituals is now done on Twitter and other social networks. With the disappearance of religion, the moral pacemaker passes to the secular society and moral innovators and pioneers appear and compete to assume this vacant role.
But one thing has changed: the speed at which moral changes occur nowadays has accelerated enormously . Changes now occur almost from one year to the next, so that it is difficult to keep up with them.
To give an example, it has always been known that "acts can be violence". Maybe 10 years ago, the slogan "Words are violence" was circulating among the followers of the social justice movement. Today it has become "Silence is violence": it is now a sin not only to speak out against the dogmas and beliefs of this new religion, but also not to speak out in favor of and obey them.
When people leave religious dogma behind, they tend to become more moral because they no longer have their imaginary friend to beg forgiveness from when they behave badly. Religion does not promote or support good social standards but instead it breeds division and deplorable behavior with the possibility of absolution in all its forms instead.
I know what you're talking about, but I'm not sure it's representative of society at large. Squeaky wheels get the headlines, but I'm not sure that predicts long term trends. And Rosenberg was talking about verbal violence sixty years ago. I don't think tribal fads constitute religions. And I don't think religion is disappearing. It fluctuates locally with fashion, but it is increasing as a percentage of world population.