Yes some Saudis do, and that too under wraps, but maybe you are not aware that the extremists terrorists actually refer to the Government of Saudi as "Kufar" "Hypocrites" "Disbelievers" etc because they DON'T support them.
They refer to the pious scholars, who call them out, as "Scholars for Dollars" because they don't support them, and encourage the government of Saudi to have taken the help of the US against them. And majority of these scholars are from Saudi too. Hence the extremists aka Khawarij hate Saudis the most and have in fact waged war against them as a State.