first. im sorry about nh's insult on you. to be honest, there are 2 things i hate from pairing war, character bashing and fans insulting.
about your statement
1. he (naruto), deserves happiness more than anyone
EXACTLY. that WAS the reason for me to support NS (yup, i was NS voter). and that IS the very same reason for me to support NH.
2. I don't want his efforts wasted on Sakura after so many chapters
his effort on sakura is nothing compared to his effort on sasuke.
3. Sakura is his happiness, Hinata is not
someone yelled at him while his heart got broken for losing his master is his happiness? someone who was regretting cheering on him for his sadness for the possibility of losing tsunade is his happiness? someone tried to stop him from saving his
lover best friend is his happiness?
WHILEsomeone who brought up his spirit from a deep depression hundreds chapter ago is not his not is his happiness? someone who pevented him from doubting himself at least twice is not his happiness? someone who would protect him even costing her life (don't forget that kushina also did this) is not his happiness?
you should have judged your own opinion before made a statement for rival fans to read. i guarantee that you will get insulted again if you dont
4. He's loved her since forever and he never changes his feelings
can be proven: Naruto
liked Sakura
can't be proven (up to ch 617) : Naruto
loved sakura, naruto
likes sakura, naruto
loves sakura.
debatable : "naruto never changes his feeling" vs "sakura has never been naruto's goal"
5. Most NH fans usually focus on Hinata's feelings and what makes her happy, not Naruto's.
nah since you said 'most of ..' i cant oppose that
but let me speak as an NH voter.
i cant count how many times ive said 'Hinata wants Naruto's happiness. she would do everything for that'. then read point 1 again
Its not that Hinata deserves Naruto, but Naruto and only Naruto who deserves Hinata. if not for our anti-harem culture, i wouldnt bother if Naruto choses both
Hinata and Sakura, TBH.
Extra : i would never support NH if it was hinata who hugged naruto.
Off topic: im going to update my sig since the debate thread has been reopened. im currently thinking about things to write

Nah, it's cool. The only emotion I felt when I read that was that I thought it was funny.
1. Same. I became a NaruSaku shipper because of how hard Naruto tried to be with her. His pain for Sakura's feelings for Sasuke always broke my heart. He's my favorite character, of course I want him to get what he wants. I care a lot about Sakura's happiness, too. That's why I'd never support SS 'cause Sasuke makes her go through too much angst. She's
never happy when it comes to him. It makes me sad.

2. Can't argue with your point there. Funnily enough, I ship SasuNaru too for that exact reason.
3. My argument there was pretty much based in the romance department, not in general. There are a lot of people out there who make Naruto happy, not just Sakura. Guess I should've been more clear there. Naruto's not like Hinata whose entire existence revolves around Naruto. He literally
is her happiness personified. I may be biased, but I'm not
THAT biased.
4. True, yet it's not exactly a strong argument. Very little time passed since the Kage Summit. That's not enough time for Naruto to just stop loving her. Realistically, it takes longer than that. That's why I don't think his feelings changed.
Counter: Naruto doesn't like giving up, and moving on from Sakura is pretty much "giving up". While it's not impossible for him to give up as it's been proven, I don't see why something like romance means "Oh, he'll give up on it."
5. I guess I can see why some might cheer for Hinata. The appeal is there, she's never hated him. But I'm Naruto-biased, so I find his efforts to be with Sakura better storytelling and much more deeply felt.
That promise ... the feels! 
Wow, you're a peaceful shipping fan.

I wish I could love both NS/NH, but it's virtually impossible for me. NaruHina is just ... meh. Boring. And Hinata's character is flat to me.