From the little I have seen, the show is very American centric, and at many points is arguably xenophobic (isolationist to say the least). It is very strange that this would be shown in Brittan (much less popular).
For the English speaking countries at least, I have always assumed that there was a core audience agreeable to the views portrayed by Fox News, hence why it is shown. I'd be happy to be proven wrong though.
But I guess I figure a safe assumption to make in most situations involving musings on the motives of publicly owned corporations is that money and relatively shortsighted plans to acquire more of it tend to trump most else. e.g. Foxtel in Australia shows John Stuart and Stephen Colbert most weeknights. Not I suspect, because the execs at Fox agree with their POV but because there is an audience for that POV and the execs can spend their money in more places than they can spend their moral conviction in their position on the political spectrum.
I would think these two goals are very well aligned.