In theory, fructose would indirectly be able to stimulate an insulin response because it is convertible to glucose - but of course, it can be converted into a dozen other things, as well - and by the time it's glucose it is no longer fructose.
Of course, all this is a moot point to argue because insulin secretion begins in anticipation of food even before food enters the mouth, and no person eats fructose in a vacuum except in a study. Arguing whether or not fructose spikes insulin levels or not ignores the reality of how people eat.