I'll watch the videos later, but again, I have to wonder what definition of rationalize you are using. None of the articles in any way showed crows rationalizing. They showed an ability to understand causal relationships, but not an attempt to make the irrational or illogical seem rational.
Crows are pretty smart as animals go. OK. That is not the same as rationalizing, sorry.
There are numerous ways in which the dictionary definition of "rationalize" is written, but I don't find any which indicate this is exclusive to humans. Seems as if this were something only humans have, the definitions would universally state such a thing. So I should think most intelligent people don't recognize it as an attribute exclusive to humans.
Here is one of the more easily understood definitions for you--
rationalize: use or exercise the mind or one's power of reason in order to make inferences, decisions, or arrive at a solution or judgments.
Every link I posted demonstrates crows with such ability. In one of the videos, the scientist literally uses the word "rationalize" to describe what he observes in their behavior. I think i provided ample evidence to support the point I made, and you've shown nothing to refute it other than your opinion. If you have anything tantamount to evidence to show otherwise, here is where you need to present that.
Seems to me that we are able to rationalize what constitutes spirituality or spiritual belief and can recognize such behavior in humans. And it generally always involves the faith in a power greater than self. So now this supposed "mass delusion" can take on different forms and incarnations depending on cultures and histories, yet curiously still retains the same general belief in something greater than self. While I think it's bizarre you believe spirituality is mass delusion, I find it even more bizarre you think this "delusion" has the ability to morph and change incarnation across culture and time yet retain the same basic conceptualization of something greater than self.
I wonder what makes you think you have a rare ability to see the truth of spirituality that most others do not seem to? Certainly you've argued that atheists are incorrect because of the volume of believers in this thread.
I don't think I have any rare ability, in fact, I think what I believe is what most humans now and in the past have believed. Overwhelmingly, humans have spirituality. So it is actually YOUR ability that is rare. Mine is the norm. I've never argued that anyone is correct or incorrect based on popularity of support, and I actually think it is kind of stupid to do so. It shows a complete lack of ability to rationalize.