Decorum becomes "interesting" shall we say, when ohhh, Jews are expected to dress this way and germans that... decorum.. you know. For all the people hollaring about "bigots", it's interesting that it's your decorum that says only Catholics can wear white (symbolically pure/righteous) where non-Catholics would have to wear - other than the pure/righteous garb. It is, shall we say, the genteel bigotry that nobody notices because they're just 'used to it'. ;)
Pay attention! Catholic Queens can wear white. Catholic "commoners" (including the subject, Cherie Blair) are to wear black. It has nothing to do with discrimination based upon religion.
Cherie Blair is Catholic, but she is not a queen. Therefore, this was a faux pas, a breach in protocol. Now, no Catholic official, including the Pope, made any noise about this.
An MP (Member of Parliament, that's in Britain) made a comment.
Now, I know logic and facts bounce off of you, but try it just once.
I'll admit that having different rules for nobility strikes the American mind as wrong. But there is little harm in this custom, and as I have noted, we have our own customs about "proper" dress for various occasions.
SD
You're such a shabby liar.