And, if you are who I think you are, I'm sure you'd be a loud voice if someone posted some rubbish book by a "history fan" or whatever they claim to be with no context. Imagine, someone just posting the cover of some Kilmeade or O'Reilly book. I'd hope, being a fellow historian, you'd critique it accordingly. If not, I again, beg your forgiveness.
Who I am is someone very much less emotional about my opinions on such things. It came with age and experience. There's not enough years left in my life to waste time in that way. If our positions were reversed, in this instance, and I had issue I would have brought up the specifics I found that were questionable and not held on to make my critique about you nor would I have gone beyond my critique to make a generalized attack on the source (that was more than the clip/images used). It wasn't a peer reviewed paper nor did it seem to pretend such.
Yes, I noticed it included a description of the Yak9-T in both design and use that ran contrary to your opinion. Such wasn't thrown at you as a 'you're wrong and this proves it.' There's room for dissent (as there always in amongst historians be they old or young, amateur or professional) and such need not be made emotional or aimed at someone personally.
So, don't beg me for forgiveness. Just approach it as professionally as you claim to be capable of doing.
(I can't go on like this. If neither of us, or even one of us, aren't interested in academically picking apart the source with even some room for concessions then this has become the waste of time I mentioned earlier.)