Hagrid is a blood supremacist, but not in the way you'd think.

When Hagrid meets the Dursleys, he insults Vernon based on his parentage, not on his actions. He also says that Vernon can't do anything to him because he's muggle, which sets the standards that wizards can get away with anything because of the power imbalance. I know it isn't really, but in Vernon's perspective Hagrid just kicked down his door and tried to kidnap his nephew with little to no explanation. Not to mention the Hogwarts letter left out some important information. How do we buy this list of school stuff? Is someone going to get him? Is anyone going to tell us how to get onto Platform 9 3/4? (Which wasn't even mentioned in the envelope, Hagrid had to tell him). No joke this is the whole letter:

HOGWARTS SCHOOL OF WITCHCRAFT AND WIZARDRY
Headmaster: Albus Dumbledore (Order of Merlin, First Class, Grand Sorc., Chf. Warlock, Supreme Mugwump, International Confed. of Wizards)
Dear Mr Potter, We are pleased to inform you that you have a place at Hogwarts School of Witchcraft and Wizardry. Please find enclosed a list of all necessary books and equipment. Term begins on 1 September. We await your owl by no later than 31 July.
Yours sincerely,
Minerva McGonagall Deputy Headmistress

What were they supposed to get from this, even if the Dursley's had wanted him to go? And after getting virtually no information they're expected to hand over their kid to some random guy because "Trust, I know where Hogwarts is. Let's go."

Back to the topic:

The way Hagrid treats Filch. He once again doesn't insult him for his actions, but chooses to call him a 'filthy squib'. Not to mention how he talks about goblins and centaurs.

In The Philosopher's Stone Harry says that Malfoy told him muggleborns shouldn't be allowed and instead of saying, "Some people have bigoted views, Harry, especially in old money houses. We mustn't take up those skewered opinions of our fellow wizardkind", Hagrid basically says that it's okay because Harry isn't muggleborn.

‘Blimey, Harry, I keep forgettin’ how little yeh know – not knowin’ about Quidditch!’

‘Don’t make me feel worse,’ said Harry. He told Hagrid about the pale boy in Madam Malkin’s.

‘– and he said people from Muggle families shouldn’t even be allowed in –’

‘Yer not from a Muggle family. If he’d known who yeh were – he’s grown up knowin’ yer name if his parents are wizardin’ folk – you saw ’em in the Leaky Cauldron.'

The next line he tries to make up for it by saying that Lily was muggleborn, and she was great, but her sister was awful.

'Anyway, what does he know about it, some o’ the best I ever saw were the only ones with magic in ’em in a long line o’ Muggles – look at yer mum! Look what she had fer a sister!’

Which also reads like: "Yeah lol muggles are the worst, but even though Lily's sister was a filthy mudblood, Lily wasn't! She was awesome! So bringing down muggleborns to their family tree of *shudders* muggles, isn't right"

In conclusion, Hagrid's a bit of a bigot.