Feanor's true motivations

[Morthoron]

"They swore an oath which none shall break, and none should take, by the name even of Ilúvatar, calling the Everlasting Dark upon them if they kept it not... ...vowing to pursue with vengeance and hatred to the ends of the World Vala, Demon, Elf or Man as yet unborn or any creature, great or small, good or evil, that time should bring forth unto the end of days, whoso should hold or take or keep a Silmaril from their possession." -- Quenta Silmarillion

The Oath of Fëanor was, in Tolkien's world view, irrevocable and irredeemable, borne out of pride and hatred. It destroyed everyone it touched and was the cause of three separate Kinslayings among the Elves, each perpetrated by Fëanor or his sons. Nothing that occurred, including slaughtering the Teleri, burning their ships, or abandoning Fingolfin's people to cross the Helcaraxë was done out of love or filial concern. To imply otherwise is nonsensical fan-fiction.