Opinions: Fëanor, ritcheous or over-proud?

[Attalus]

Originally posted by Maedhros
And with her own narrow mind, she didn't perceive that she was tainted too. The sad thing is that by refusing to give him a lock of her hair, she showed arrogance and petulance too.

Ah, but she and all the other Noldor were but touched by the shadow of the same evil had fallen upon the minds of all the Noldor, and upon her own. Feanor had the full evil that Galadriel sensed.

Some definitions: (Merriam-Webster)
petulant-1 : insolent or rude in speech or behavior
2 : characterized by temporary or capricious ill humor : PEEVISH

arrogance- a feeling or an impression of superiority manifested in an overbearing manner or presumptuous claims

I don't think that Galadriel was insolent or rude in refusing such a personal request from someone she disliked heartily, and doubt she was manifesting an overbearing manner or made presuptuous claims. On the other hand, such an obsession with his niece argues an unhealthy state of mind.