not 100 % sure, but I think Frieser mentioned in a sentence that intelligence didn't indicate any major threats. And as stated before many generals at almost all levels of command clearly disagreed with the halt-order and they "probably" read their intelligence reports. Frieser examined the orders and war diaries of that time.
See that's where I think the focus should be. The opinions of generals, even if stated at the time, don't prove anything. Men can be wrong, and their opinions, contemporary or not, are just that. They are influenced by personal circumstances, feelings, and characteristics. Moreover, different commanders will have a different intelligence picture. Basing a damning argument against the order on the opinions of those against it is rather ridiculous. Of course one will come out with an opinion that the order was wrong.
I'm not agreeing or disagreeing with the argument, rather with the way the argument seems to have been formulated as conveyed by your video.
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