"These are all religions. These are the religions I don't approve of. It is outright dangerous that they are not recognized as religions, at that, and that they are given legitimacy as secular ideas, when they are not."
In Evangelical circles it is well understood, that "Thou shalt have no other gods before me" refers not only to organized, acknowledged religions but also to anything that one places as more important than God.
And that is the danger of these secular religions: that it is easy to take a subset of useful heuristics, forget that they are tools, give them supremacy, and make them a new god. A false god.
It is, essentially, making the map the territory - and that is a very dangerous thing to do.