"Ah...are ya such a ninny...

as to get yourself captured as well?"

Those were Ivanhoe's fathers words to him towards the end of the film.
Ninny of course is synonymous with idiot or fool, but its a gentler admonishment usually given by someone who is forgiving you your foolishness.

As, thankfully, Ivanhoe's father did finally realising that in spite of going against his fathers wishes, he did what he did for his motherland.