"There is no redemption for the fallen angels. The nature of their creation and fall is distinctly different from ours."
Yes. We are given this one life for repentance -- but in eternity there is no more repentance possible, just as there is no repentance possible in that eternity in which the demons exist.
Not because God has cruelly said "sorry, boys, it's too late -- had your chance," but rather because we will have shaped our souls in this life in such a way that *we* will be incapable of repentance -- not that God will be incapable of love and forgiveness.
How right you are. "Incapable of repentance" = arrogance and pride, our fallen flesh, the spiritual "mud" that covers our souls, through which God's light never shines.