I've recently created a Nord who hates magic and elfs but I'm finding it so hard to RP them, they seem so, good. Il try adding more backstory for him but does anybody have some extra tips?

Make it so that he was born in Windhelm and is a staunch supporter of Ulfric. That way he'll have grown up amongst a general consensus that dark elves are filthy cheating freeloaders and he'll hate high elves since the Thalmor - the enemy, of course - are all Altmer. Have him loathe the Bosmer for their depraved cannibalistic tendencies and, boom! You're good to go.

Perhaps his father was killed in the Great War fighting the AD, and his mother was arrested by the Thalmor for worshipping Talos. He grew up a beggar on the streets of Windhelm and was beaten severely by a Dunmer merchant for trying to steal a loaf of bread from his shop.

Then he got cheated in prison by a Bosmer or something, I don't know.

And stay away from anything of elven or orcish make. Wear an amulet of Talos.

Attack the Thalmor whenever you see them escorting a Nord prisoner.

To motivate his hate I'd say have his family being abducted by the Thalmor. Should work wonders.

And it was a Dunmer who informed the Thalmor for a cash reward.

Not to mention the Bosmer friend of the family turned out to be an informant who told the Dunmer about it.

And a group of Orsimer bandits that robbed him and left him for dead in the Skyrim/Cyrodiil border, leading to the near execution of the PC.

Why does he hate magic? Why does he hate elves? Were his parents killed by the Thalmor? A sibling perhaps? We're the Thalmor the reason for his arrest? As others have said, perhaps an Amulet of Talos, or any other divine for that matter, could be appropriate. Will he cut them down in the streets, or leave them be and get revenge in other ways?

As a RPer, I don't particularly like giving people backstories - I find it's much more rewarding when you come up with your own story. But here are some pointers

yeah I've never tried to create a backstory for a TES character. Never look back.

Well obviously he hates the Thalmor like anyone. But to inherently hate all elves, the Thalmor must have done something horrible to him. Maybe the Thalmor were behind a terrible childhood tragedy? Or your character was a devoutly religious fundamentalist of Talos and banning his worship is absolutely evil.

Remember to wear the Amulet of Talos and use Wuthraad. Go on Thalmor hunts every so often and join the Stormcloaks. Live in Windhelm or another place where Stormcloak presence and general popularity of the Stormcloaks is high. Listen to the Talos preacher in Whiterun.

Fargoth stole your ancestor's ring!!

Massacre everyone in the grey quarter

that'll show them. that'll show them ALL.

Don't forget. He witnessed a Dunmer woman stab the last unicorn in skyrim to death with a crochet needle.