As with the Second Amendment, he and the other dissenters assert a “collective” right, the establishment of which is purportedly the Constitution’s ultimate purpose, as a justification for curtailing an individual right.
In this case they at least acknowledge the individual right exists. But then the First Amendment, unlike the Second, has no prefatory clause explaining its purpose; it simply says “Congress shall make no law . . .” Breyer has to venture outside the text to find a reason to read that prohibition equivocally.
It’s important to note that when Breyer refers to “collective” rights, what he does not have in mind is individuals exercising their rights by voluntarily collecting themselves into organizations. In fact, the prevailing left-liberal view, most notably with respect to Citizens United v. FEC (2010), is that collections of individuals, at least when they take corporate form, have (or should have) no rights.
The only “collective” that matters to Breyer is the one from which you cannot opt out except by the extreme measure of renouncing your citizenship: “the people” or “the public” as a whole. In Breyer’s view, the purpose of the First Amendment is to see that (in Chief Justice Hughes’s words) “the will of the people” is done. Individual rights are but a means to that end. To the extent they frustrate it, they ought to be curtailed. You will be assimilated.