I think there is some truth in that, obviously. We, as in white people like me, possibly mostly but not exclusively men (like me), manufactured the brand of racism that is arguably most common and pronounced in the world today. Which is why it is very difficult, but potentially very interesting, to try understand what might have been going on, in the OP case, and what might be going on regarding the issue/phenomenon generally.
But herein lies the trap. The people who push racism are NOT like you if you don't push racism. Racism isn't inherent to "whiteness", even if the people who invented it and spread it everywhere were white. To insist that would itself be racist, as Derec noted above. Racism isn't "whiteness" anymore than street violence is "blackness". There is nothing inherent to one's race that causes either of these things.
We've done your overly-simplistic take on what is and isn't racism many times. I don't take the same approach as you and I don't think yours is a good one, for reasons given many times. I can't really be bothered to discuss it with you again. Suffice to say that I think there's much more nuance than your trite categorisation which seeks to not distinguish between things which may not be equivalent, imo. Making general observations, even if involving criticisms, in group terms, is (a) not only not necessarily racism by any reasonable standard (though you would like it to be considered automatically so) even if incorrect and (b) hypocritical of you, since you yourself make sweeping and indeed unsubstantiated generalisations about groups you criticise when it suits you (eg feminists) and you end up hoist by your own unworkable, anti-identity politics petard.
A long, long time ago I suggested to you that you adopt a more flexible and complex approach, which would allow for analysis in group terms in some ways and at some times, and in individual terms in other ways at other times, or a simultaneous combination of the two, without crying foul, but you persist with your dumbed-down approach, the one that allows you to decry the former (group analysis and framing) when you want to. Why? I don't know, but it's an incessant rerun of a regurgitated mantra about identity politics that I think you probably gleaned from sources which are less than balanced or sophisticated (sources with an anti-'left' bias, basically).
And, setting potential racism temporarily aside, what surely matters most here and would be most interesting and enlightening, is whether the writer of the article was correct, or not, and if she was correct, what are the explanations and processes, and if she was incorrect, what gives with that (some sort of anti-white prejudice or unfair blanket categorization or generalizations about whites being only a few options among many)? Not that we can work all that out. We don't have sufficient information, whether in the specific or general case. But with most of these things, there'll likely be ways it's a mixture of correct and incorrect.
At this point, my gut feeling is that she over-egged her pudding.