is unsettling to middle of the road opinion

[Klpno]

Hello everyone

I'd like to ask what the phrase "is unsettling to middle of the road opinion" imply in the following context:

Cameron is surely right to be concerned. If the prospect of an all-out confrontation with the rest of the EU is unsettling to middle of the road opinion, the end of the UK is much more so. What do you call the country that remains? It isn't England, quite, because there is also Wales. Does it stay a Diminished Britain, a Little Britain, whose flag is a simple spider of red lines on white? Trident, of course, goes because the naval bases in Scotland go. What about the currency? If the euro is circulating just north of Newcastle and Carlisle, the pound will feel more embattled.

Does the phrase "is unsettling to middle of the road opinion" imply "is disturbing the people with moderate political views"?

[Mister Micawber]

Moderates are not comfortable with the idea.
_________________
Native English teacher at Mister Micawber's

[Klpno]

Thank you very much, Mister Micawber.