Israel had no real interest in inciting Egyptians to violence, so I doubt the man was acting under Israeli direction. Also, there would have been no need to forge an entry permit if he pretended to be a newsman. Mossad would have gotten a genuine newspaper to hire him. It is easier to believe that Ilan is just a foolish thrill seeker.
Motorcyclist in his 20s dies after crashing near Gedera (Haaretz)
from the article: Mother of Israeli arrested in Egypt calls spy charges 'bogus'