There is nothing 'liberal' about what the Archbishop is saying.
Unless you equate religious tolerance with liberalism. Which would be wrong. It's more like any pansy sentiment you don't agree with, you lay at the feet of classic liberalism. Which is to be expected from an american, but not from a brit - originators of common law.
Perhaps the Archbishop is trying to pass on what the British government did for his own religion (see:
http://en.wikipedia.org/wiki/Catholic_Emancipation)
Here is what it comes down to:
"He says Muslims should not have to choose between "the stark alternatives of cultural loyalty or state loyalty"."
That is, how shall I say it, absolute bull****. It is not only a stupid statement, it is a dangerous one. It is radically un-American, and it ought to be radically un-British as well, if they have any sense about it.
And you can go read a conservative thinker like Christopher Hitchens to go see why. Or read Oliver Wendall Holmes. Or do lots of things, it isn't hard to see what the issue is - when religious law is in contradiction to the law of the state - the state wins. Every single time.
You can't predicate a nation upon religious tolerance any other way. If my religion tells me to cut your head off because you walked on my lawn, then my religion is f***ing looney, and should be outlawed.
If my religion says it is alright to chain my lawful spouse up, then my religion is looney and should be banned.
If you want to use the word liberal in a pejorative context, learn to understand what it means. A liberal concept would be to call all of this toleration of illegal precepts a bunch of crap. Again, you can go read a conservative writer like Hitchens if you don't trust all that book learnin'.