The phrase "are most insecure" is correct and usable in written English.
It can be used to describe a group of people or things that exhibit a high level of insecurity.
Example: "Among the various social groups, teenagers are most insecure about their appearance and acceptance."
Alternatives: "are highly insecure" or "tend to be the most insecure".
That leaves those parts of the country that are most insecure almost certainly without observers.
Again in India, it's the jobs that pay the least and are most insecure that have been increasing the fastest.
Yet at a moment when all over Europe economic anxieties are playing into the hands of xenophobes, who propose that we shore up our security by excluding or oppressing those whose lives are most insecure, it is particularly urgent to resist the blinkered authoritarianism that lies behind these arrests, which are not only unjust but hypocritical.
I am most insecure about my skin and body.
In the book, Salander's breasts are the part of her body she's most insecure about; she's not the type to casually walk outside topless.
We know that it's hard to be scrutinized and have the thing you're most insecure about - your body - criticized openly.
The flight of health professionals from conflict affected states and areas does not only produce generalized shortages but skews those shortages to those areas that have been most insecure, often rural and remote ones and towards more clinical (emergency response) and away from public health functions.
If not stand up to them, they are most likely just an insecure person on the inside, acting like a tough guy/girl on the out.
Security expert Robert Graham has done a bit of research and posts that the encryption standard used by earlier versions of the "secure" Tor protocol is most probably insecure and readable by the NSA.
I'll let you in on a little secret -- (the majority of) yoga teachers are the most insecure, confused, lost, egotistical and wounded human beings alive.
My mind is a most insecure thing, not to be depended on.
