I have not seen any place on Free Republic that states that one must support McCain to post here; rules against advocating sedition of the government, yes, but not rules against posting to point out McCain’s own leftist and unConstitutional leanings.
If your conscience permits you to vote for a Democrat-arse-kissing life-long politician, then by all means follow it, but if your conscience is clear on the matter, than nothing I or anyone else can say should disturb you.
Again, why does any of this matter to a Brit like yourself? Who cares what you think?