If god is all about forgiveness, then why doesn't he forgive lucifer?

Because sitting on a cloud all day playing a harp for eternity is boring af
No weed or strip clubs in Heaven, probably. Only dull boring ass squares go there. Musty smelling old church people and prudish housewives with bouffants that cut the crusts off their pimento cheese finger sandwiches

why is he evil?

He was non-repentant. i.e. he never asked for forgiveness

Bedazzled 2000
Bedazzled 1967

Considering humans were expelled from there I'd argue that Paradise won.

New evidence from previously unknown dead sea scrolls suggests that Jesus's last words were in fact "fuck you I won't do what you tell me."

that brings in the the argument the book was trying to make.

what is Paradise? heaven no, hell no, earth yes

Why would an omniscient, omnipotent deity create an inherently evil seraph? Unless that deity didn't actually design the first free-willed creature aka human.

I remember those movies. The original was good, I don't remember if the remake was.Raquel Welch and Elizabeth Hurley were both hot af though

That isn't what "forsaken" means.