To the Thorondor_ person ---> You didn't write how much
evil was too much. What are your units of evil measurement? Please excuse me. Am merely bringing it up because you wrote that he brought about too much evil. Mayhaps, if I knew the system of measurement, I could agree with you or debate the point. oh well. Anyways, I can see why some of the examples of evil-seeming things might seem evil to some.
Allow myself to explain the tragic character of
Feanor ---> Slaying of some particular
elves is evil? Not really. They were stupid for standing in the way of an especially as well as achingly famously fiery tempered personality. He showed a Herculean amount of restraint in the first place for asking them for their
ships instead of just taking them. Do you people think that he was just a whiny as well as spoiled little boy? Well, even if you do, he wasn't. He had the legendary love for a dad that had to be avenged! Lots of creepily righteous fury driving him and some random
elf says ---> "Nah. We enjoy uselessly piddling about our tiny island. Waste lots of time making your own boats, why don't you?" That was pretty stupid of him. Poor Feanor snapped.
Leaving fellow soldiers behind? I would say that he was being nice to those people who didn't even consider themselves to be fellow soldiers. He knew that they didn't really want to come anyways. He took the most useful (loyal) elves with him and gave the others a chance to go back to paradise. Besides, the leaders of those other dudes didn't like him very much. Wouldn't have been as smooth of a victory for Feanor. Also, it isn't as if Feanor forced them to follow him. Maybe his stirring speech was just too good, though.
Blasphemous oath? Was it really blasphemous? I am not a fan of the crazy types who toss that word around so casually. To Feanor, he was the equal (or most likely, superior) to anybody. Gods are people, too, you know.

Besides, anything that came from others deciding of their own free will to join in the oath isn't his fault. But then again, maybe his speech was too good again.
Hm. I didn't really wait for you to allow me, did I? oh well.
To the Grond person ---> Garn. Lots of that is just crazy opinion that I can't really argue with. Yes, to you, the superly cool Feanor character was probably a self-centered, egocentric jerk. Why not? Good for you. I would write that he was a self-centered (never a bad quality), egocentric (same) as well as achingly misunderstood artist. *sniff*
Worth less that zero because you write that he should have cared about the unimportant inconveniences tossed at gods? Craziness. Why should he have cared about the unimportant inconveniences tossed at gods? Especially if they are unimportant. oh well. Worth less than zero because he refused to receive assistance? Why? Pride is great! Yay pride! Worth less than nil because he decided to challenge any random
Valar type thing? Are all of the others that did that (including your hero) worth the same?
Truly Rolling On Floor Laughing (or do that letters stand for elsewhat?)? I call abandoning of any random relatives that which I already mentioned in my bit to the Thorondor_ person. Look up there. Anyways, I was writing of achingly literal ---> Feanor physically stabbing anyone in the back. Please excuse me.
Also, baragund person ---> I wasn't thinking of that when I first asked if I could discuss people's opinions. sorry about that. I just enjoy tossing much awareness at people about superly cool as well as more interesting than the insufferably popular characters types of characters. I happen to be achingly confident in my position in that little debate thing. But then, if I do come upon some achingly cool new idea in here, Yay! You people would know all about it, too, though.