the nobility of which he believes there "can be no doubt"

John is supporter of war because it is for noble cause and for the betterment of the people

Jackson6612

I couldn't understand the underlined part in the following text:

In recent years, John has been an outspoken supporter of the Iraq War, the nobility of which he believes there "can be no doubt".

Shouldn't it be:
In recent years, John has been an outspoken supporter of the Iraq War, the nobility of which he believes there ''can be no doubt about''?

I had never been to the URL books.google.com, therefore didn't know about that feature. By the way, I did googled that expression using quotation marks which resulted in no help. Thanks for letting me know about this helpful feature.