No I am not saying that anyone is wrong, I am saying that different people have different opinions, and that words can be interpreted in different ways.My my, aren't you are the one that saying other are wrong from begining and arrogantly try to 'educate' other.
You are refusing to accept this and are insisting that everyone must see it your way.
I do not consider Britain and British to be synonymous because they aren't. If you wish to view it the other way then that is your prerogative but you should be aware that the dictionary definitions of the two words is against you.
This if you use them interchangeably you may well be misunderstood.