Originally purposed for [this ELL question](https://ell.stackexchange.com/q/51765/8712), the following from [this thread](http://forum.thefreedictionary.com/postst31804_Another-who-whom-question.aspx) claims that which I've greyed.  

I ask about such a claim for English and French.

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> [User 'RuthP' dated 2012 Dec 26:]  
> 
>  That is a(n incorrect) hyper-correctness, to which many people are prey. No, because the only verb you have is **to be** (**are**, in this case). **`To be`** `cannot take an object, because it is an identity`, so in your sentences, **who** and **we** are the same. Since **we** is the subject, so is **who**.
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Footnote: I'm unversed in linguistics, but I'm self-learning this with *A Student's Introduction to English Grammar*, 2005, by Rodney Huddleston, Geoffrey Pullum.