The phrase "as intolerable as" is correct and usable in written English.
It can be used to compare the level of intolerance of one thing to another, often in a negative context.
Example: "The noise from the construction site was as intolerable as the blaring sirens from the ambulance."
Alternatives: "just as unbearable as" or "equally unacceptable as".
To her red-shirted supporters it would be as intolerable as a military coup.
" 'Dirty Jew' is as intolerable as 'dirty Arab,' " Dieudonné told the Swiss newspaper Le Temps in 2004.
"For some people antidepressants may be essential, but these sunshine pills have their own shadows and some people find the side-effects as intolerable as the depression itself.
In this way, I find the generic campaign commercial touting the good Christian family man nearly as intolerable as Mr Conway's spot.
In 1849 George Bancroft, an American historian and diplomat, said that for a man to have two countries was as intolerable as for him to have two wives.
The roads were good and the landscape placid, and considering that it was already late April, the heat was not as intolerable as it would soon be.
In India the emergency was a bruising colonialism that had become as intolerable to artists as to everyone else.
An escape into apathy and false security was as intolerable to him as terror is to most people.
It takes your breath away, really: the same board that viewed Mr. Hurd's minor expense account shenanigans as intolerable has chosen as its new C.E.O.
Mr Obama may have to agree to a spending-only trigger, and hope that cuts to veterans' benefits and defence will be as intolerable to Republicans as tax increases.
This last point is one echoed by Dr Urs Heierli, (pdf) who suggests that the lack of widespread political support to date comes down to a misguided set of priorities: "Political forces and their international institutions do not, it seems, consider hunger as intolerable and as a major human problem.
