really I should have said appropriate.
Having been schooled in BC/AD, and not really getting a memo about the change (see also: Peking) I'm not dogmatic about it (truth be told I only bought it up because I was being hit over the head with "facts" that called out for a snark).
However, using a Christian-centric dating system does rather underscore the cultural fascism of The West. Especially when you realise that the vast majority of the world have very little knowledge of, or interest in, a random supposed prophets birth over two millennia ago. It's also disregarding the fact that for a lot of people in The West today, by dint of not being even vaguely Christian, it speaks of a "Lord" they may not wish to support.
Where as "Common Era" is very much a secular drop in. No numeric conversion needed, and it reflects that regardless of the religious aspect, that dating system has marked most of European and Western history as it is recorded.
Given how much I have written, I can't begin to express how little I care whether someone uses BC/AD or BCE/CE. Although for the sake of my undiagnosed conditions, please be consistent 😀