Indyvidual

Seems that way. Another one best ignored while he lets of steam to keep his boiler from bursting until his fire goes out.

Removing citizenship makes people stateless. It literally makes them refugees.
Unreasonable,
No ! They've either taken on taken on citizenship with Islamic State or sworn allegiance so, they're not stateless nor refugees !

"The actual ethics of both Christianity and Islam are laudable."

As for all religions in their own right;
Some aspects are indeed laudable, whilst other aspects are deeply flawed and repulsive.

Clearly people have lost the ability to think clearly and reason based on merit.
This in itself, should be enough to prove that no religion has yet attained pure perfection.

If just one religion found the golden key to peace, harmony and happiness, the world today wouldn't be such a rotten apple.
People would discard the others and take up that one religion in an instant.

Rwligion has proven to be an extremely powerful force
in human behaviour and in particular in how we relate
to each other.

For a small minority religion overrules everything else -
ethnicity, nationalism, science, and even family. It's
not only in the distant past that belief in the supernatural
overrode natural thinking.

The way of ideas in the
early 21st century is not between "the West" and "Muslims"
as we are led to believe.

Neither are military concepts and there is little difference
between the strictly religious west and fundamentalist Islam.
There is a small, but extremely powerful fundamentalist
religious west, and similarly there is a small properly
larger fundamentalist Islam.

It is possibly the case that in all religions there are those
who are rooted in the literal word of their "god-given" tomes.
This was what fundamentalism meant when it first arose within
sectors of US Christianity. They have what has come to be known
as the "God gene."

Fundamentalists wage war on the secular as well as those who
believe in a different religion. The scientists, and this
means by and large, the scientists and humanists, are the people
under attack today. The real war of ideas is being fought on
between those two worldviews, however, this is not to neglect
sectarian warfare as we've witnessed in Ireland not so long
ago, and as we experience in television nightly with the news.

"No ! They've either taken on taken on citizenship with Islamic State or sworn allegiance so, they're not stateless nor refugees !"

My God some people are thick. Which specific region is currently under the control and administration of the Islamic State?

Foxy
What sectarian warfare in Ireland?
The British troops on the ground were doing what their Government told them to do, and Catholic or Protestant they did their duty and couldn’t have cared less what religion the bloke shooting at them was.
The loyalist Orangemen may sometimes have been motivated by religion but mainly they wanted to stay ‘on top’ and have the perks that went with militant Protestantism in British Occupied Ireland, to wit, jobs and housing.
The Nationalists were predominantly Catholic but for them it was a fight for Civil Rights, such funny things as ‘one man one vote’, an end to discrimination in jobs, housing and the British out of their country.
It is well to remember that many of the heroes of Irish Republicanism were Protestants.