Okay, why not? Then comes all stuff about what does this mean in practice and theory. And there are so many forms of Christianity arguing. The simplest one of them still is just be mindful and kind, for the sake of the Lord who was and is.
This Kumbaya Collective you describe is a behavioral pattern that many folks take part in. Some of them may happen to be Christian, others may not.
But to observe that some Christians are part of the Kumbaya Collective and then go on to imply that being part of the collective is a “simple form” of Christianity is a categorical error.
Behaviour does not imply Faith.
I myself was raised in a Christian organization that did not believe Christ was lord, but rather a person sent by god to show us by example, how to be, spiritually, in order to enter the kingdom of heaven. They also don’t believe in the holy trinity.
So do consider that you do not speak for all Christian’s and not all Christian’s hold the same beliefs.