The article is not talking about signalling/declaring tribal allegiance. The article is saying that people support lies because they see the public argument as an informational battlespace that their side needs to be victorious over, and the truth is irrelevant. Endorsing lies is a necessary evil to prevent your side from losing ground.
I think you can see this in how this behavior cuts across ideological lines. You see left people acting this way on many topics going back many years, and the same on the right. And then the ease with which many engaged with this "switch sides" (in terms of US politics), as with RFK Jr and his followers. I don't think it's really a traditional partisan or "tribal" thing for them.
The article is not talking about signalling/declaring tribal allegiance. The article is saying that people support lies because they see the public argument as an informational battlespace that their side needs to be victorious over, and the truth is irrelevant. Endorsing lies is a necessary evil to prevent your side from losing ground.