From Ross Douthat's latest column:
In 2006, Gallup asked the public whether the government posed an “immediate threat” to Americans. Only 21 percent of Republicans agreed, versus 57 percent of Democrats. In 2010, they asked again. This time, 21 percent of Democrats said yes, compared with 66 percent of Republicans.
I suspect you would find something similar in Britain too, though perhaps the effect, like so much else, would be more modest. As Ross says, however, "Given how much authority is concentrated in Washington, especially in the executive branch, even a hypocritical and inconsistent opposition is better than no opposition at all."“
In other words, millions of liberals can live with indefinite detention for accused terrorists and intimate body scans for everyone else, so long as a Democrat is overseeing them. And millions of conservatives find wartime security measures vastly more frightening when they’re pushed by Janet “Big Sis” Napolitano (as the Drudge Report calls her) rather than a Republican like Tom Ridge.
That's also true for life at Westminster though, of course, as tends to be the case "a hypocritical and inconsistent opposition" is also the only type available.