Feanor Self-Important?

[Lord of Angmar]

Well, I can see your point, but there was another reason that the Teleri resisted, and that is because aiding the Noldor would have been going directly against the will of the Valar. Furthermore, Feanor's plan was not to have the Teleri taxi them to Middle-Earth but the borrow the ships, which he almost certainly would never have returned. Olwe certainly foresaw that his ships would not return to him. Of the ships that Feanor did end up stealing many were lost at sea.

Also, Feanor was the first one roused to wrath, and why should not the Teleri defend their ships if he attempts to steal them by force?

The Teleri giving the ships to the Noldor would have been against the will of the Valar and would also have cost them their greatest works, which they should not have felt obligated to give to the Noldor, whose parting they obviously knew was folly. Since Feanor attempted to steal the ships, his actions directly resulted in the Kinslaying and he was responsible for the battle at Alqualonde.