No.The theory that Egyptian Gods are Demons is a Pandemonium(i.e. when someone of x religion decides to call demons all gods/entities of another religion).
The first pandemonium made by Judeo-Christians was the Summerian/Assyrian paganism as most of Summerian&Assyrian gods were made Judeo-Christian demon.Mostly Jewish.
Christianity was born later,and it already had most of its "demons",so everything that remained was to give Satan his own "nationality".
That "nationality" was Egyptian(since Egypt was the closest place to Judea). Thus,the fact that most demons were Summerian/Assyrian,was forgotten(even because these civilizations were almost lost),and Egyptian Religion was biased as devil worshiping,and Egyptian gods,as demons.