I'm not at all sure what you mean by your first point.
Regarding your second point, it seems that you are arguing by definition. If religion is so broad as to include some very vague cluster of transhumanist beliefs, then it also includes organized sports and a variety of other things. At that point, people will probably agree that religion isn't necessarily irrational for the simple reason that religion includes so much.
Regarding your third point, that seems for related reasons to just not be helpful. Even if something is rational is a "religion" that would not stop some religions from being more rational than others. For instance, I suspect that you agree that ultra-Orthodox Jews who insist for religious reasons that mice can spontaneously generate are being more irrational than many other religions.
Regarding point four, as far as I'm aware transhumanism isn't taught in public schools or treated in colleges pretty much at all. So I don't see why you care about this. Indeed, if some form almagam of Singularitarianism and transhumanism gets recognized a religion, the only practical consequence as far as I can tell is that Eliezer Yudkowsky would be eligble for the parsonage allowance. So are you saying that the IRS should make things easier for the Singularity Institute?
IRS should make things easier for the Singularity Institute?
Yes, absolutely.
So I don't see why you care about this.
I can think of two posts where teaching transhumanism in public schools is explicitly advocated. Hence, it is already being thought of.
that ultra-Orthodox Jews who insist for religious reasons that mice can spontaneously generate are being more irrational than many other religions.
Yes they are. On a tangent to that note, would it be kosher to grow non-kosher insects in apples as it would be thought they spontaneously generate and ...