I don’t disagree, although, the reaction of many liberal Christians is not unlike moderate / liberal Muslims in the US. They are largely professional / upper-middle class, certainly not radical, and they tend to say, what would you have me do, issue a statement decrying Islamic fundamentalism every day of my life?
I suppose in an ideal world what I’d have them (and liberal Christians) do is disavow a faith which, as you say, has a fundamentally controlling, even violent actual basis, whereby liberal adherents are kindly in spite of, rather than because, of it. But then I’d be a controlling asshole like the fundamentalists. People can only do what they are ready and able to do. I try to focus more on the ones who can’t live and let live, and that ain’t liberal Christians or Muslims.