[elbenprincess]

Knowing when to stop is returning when the Valar place a curse on your errand. Finarfin was wise and knew when to stop and that was when the Valar cursed them. This is why Finarfin is the ONLY Noldor Prince/Lady to not inherit the weakness of pride the others did including Finrod and Galadriel.

If she acted perfectly then she would not have received the ban, that all the Noldor had

I anyway don´t understand why they were banned, the Valar said that they are free and could leave if they want but they still banned them, even those who were not guilty in the kinslaying. Galadriel had the right to go, she was no prisinor. Pride is not always a weakness, it saves ones self-respect. If you are convinced that what you do is the right thing, then you should fight for it and maybe even refuse forgiveness, if that "pardon" includes that you have to admit you were wrong. Never should anyone act against his or her believes.

IMHO Galadriel was right when she refused the pardon, because for what should she need to be forgiven? For leaving Aman?
The Valar were wrong.

"The Master of the house was an elf-friend - one of those people whose fathers came into the strange stories before History, the wars of the evil goblins and the elves and the first men of the North.

"Elrond's character had yet to be fully developed when The Hobbit was first published. Rateliff's The History of The Hobbit has a detailed section on Elrond's character, as Rateliff notes:

...and the very presense of Elrond himself, who is certainly not described as an elf (at the end of the chapter Elrond, the hobbit, the wizard, and the dwarves go outside to 'see the elves' dance and sing) and seems to not have been conceived of as an immortal or even particularly long lived at this point, - The History of The Hobbit: Mr. Baggins; Ch III, Rivendell.

And in The Annotated, in A Short Rest: note 9, Anderson refers to a 1964 letter where Tolkien called Elrond's naming a "fortunate accident":

Tolkien wrote to Christopher Bretherton in a letter of July 16, 1964, "The Passage in Ch. 3 relating him to the Half-elven of the mythology was a fortunate accident, due to the difficulty of constantly inventing good names for new characters. I gave him the name Elrond casually, but as this came from the mythology...I made him half-elven."

"Tolkien needed a name for this character in The Hobbit who was an "elf-friend" and the master of Rivendell, and it appears he casually plucked the name Elrond. This would become a fortunate accident, because Tolkien realized Elrond was already a character in his mythology, and already the "half-mortal and half-elfin" child of Earendel and Elwing ("Sketch of the Mythology"). I'm not sure when Elrond's full character gets fleshed out, but it would not be anytime before LOTR."

That all is copied from someone who wrote that in another forum.

Well, I wouldn´t read too much into it.
Elrond "chose to be counted among the Eldar" and therefore is included in that quote despite being half elven, with Arwen it´s a little more difficult, but alone the fact that Tolkien said that her and Aragons wedding was the third between the Eldar and Edain is prove enough for me.
They are called called half - elven, not half-man, so it is reasonable if they would be included in such a general statement.

What about Eomer's quote?

Yes, Eomer thought Arwen was fairer, Gimli Galadriel, so now, what was Tolkiens opinion on that? Maybe he wasn´t sure. Whose opinion has more weight?

They rejected Finrod, Feanor and Galadriel

When did they rejected Finrod? He was king and would have stayed king, if he would not have helped Beren, Feanor nobody liked and Galadriel would have been Queen after Gil Galad, if they would have let a women rule, but at that time the Noldor left ME.