This sounds like you understand better than the other anon(s), so I will try to explain why my opinion is disagreement. First and foremost, I must say I agree that in normal circumstances rapidly shaking and squealing about a girl's cuteness is cringe. Yes. I already said this is the case in the first post about this subject, the normal reaction is cringe. I never denied this, so you are understanding this but maybe you still don't understand the point I try to make. For now I will explain more clearly.
What you maybe only consider is, if you rapidly shake your fists and squeal about a very cute girl such as an idol's cuteness, that can be seen as autistic or cringe or such even by idols. This is undeniable. In this instance, it is because the expression is inauthentic. If it is authentic, the idol will not cringe because she feels that it is because of her cuteness. She will know that you are insincere if you force such an act. She knows that she is cute, therefore she will know if you are not sincere in your expression. This is to say, even if maybe you can perceive her cuteness, you must feel it to be sincere in your expression such as rapidly shaking your fists and squealing about her cuteness. If it is not sincere, she will know. This is why autists can rapidly shake their fists and squeal about a girl's cuteness without any internal conflict, because they are autistic. Idols can feel the autism, and maybe cringe, but it is a sincere feeling and she knows this.
You seem to understand, I am not saying it is a necessary act to rapidly shake one's fists and squeal about an idol's cuteness. My argument is that it is possible without being autistic, cringe, gay, or anything such. Indeed, you are right to say that the nationality is irrelevant when it is cringe. If it is cringe, it is cringe. If it is autistic, it is autistic. This is the important difference. If it is not autistic or cringe, she will not cringe about it. Many layers exist to explain when it is cringe and when it is not cringe, I will not explore this in depth because it does not matter. Importantly it is important to take note of the length of the shaking and squealing, as I keep repeating RAPIDLY shake one's fists. If you continue to do it after she sees, then surely it becomes cringe within less than one second. It is RAPID shaking and the squeal also must be short. It must be authentic, sincere. Girls may do it in inauthentic, insincere, ways because in such cases it is impossible to explain otherwise than as a "girly" expression. But, guys must be rapid and the squeal also must be authentic. I believe it comes more naturally if you are autistic.
If you never saw an idol who makes you rapidly shake your fists and squeal about her cuteness, that is not important. You don't need to have this reaction, you can have other reactions. It is important to feel the cuteness of idols, not how you express your feeling of their cuteness. I am only making a point about the idea that it is autistic, cringe or gay or such, which is false if the expression is sincere.
You say they only pretend not to cringe, but it is not true, because you can see when someone cringes even if they pretend not to cringe. Idols cringe if you are insincere, inauthentic, about your expressions. You mention babytalking, this is completely different. If you do this, yes, she will cringe because it is cringe to do so. Rapidly shaking your fists and squealing about her cuteness as an authentic sincere expression of her cuteness, is completely different. Maybe you are picturing this in your head wrong, the act of rapidly shaking one's fists and squealing. It takes one second, or less. If you continue it, even if it would be sincere, then it becomes autistic or cringe. This is not questionable. It easily can become autistic or cringe for other reasons too, though, this does not happen if it is truly sincere and authentic and only because of an idol or other very cute girl in an environment in which she is the focus of attention. When she is not an idol, there are many more reasons why it becomes autistic or cringe. In this case, the sincerity is not most important and there are too many variables because almost always it will be cringe. Dependent upon the situation, an idol is very different. Idols spread happiness and their cuteness is important for this, and they know it, in appropriate situations making the rapid shaking of one's fists and squealing about her cuteness possible without autism or cringe. The "tranny" caller said about hugging idols, this also has much potential to become cringe. It is not the exact expression, it is the sincerity and duration and such that decree.
Maybe now you understand the point?