It seems to me that the change is that with “us” the speaker is assumed to identify with the group under discussion. Specifically, it seems like they consider(ed) LW superior, and are disappointed that we have failed in this particular; whereas with “they” it seems to be accusing us of hypocrisy.
It seems to me that the change is that with “us” the speaker is assumed to identify with the group under discussion. Specifically, it seems like they consider(ed) LW superior, and are disappointed that we have failed in this particular; whereas with “they” it seems to be accusing us of hypocrisy.