They have an extreme hatred of those who are muggles, or those who are half-blood; half wizard and half muggle.
Their leader,Lord Voldemort, unbeknownst to them, is a half-blood himself.
Don't try and be like those Death Eaters man, it just isn't worth it!
The Death Eaters are Voldemort, the Carrows, Dolohov, the Averys, Rookwood, the Rosiers, Selwyn, Crouch Jr, the Lestranges, the Crabbes, the Malfoys, Gibbon, the Goyles, Jugson, Karkaroff, the Mulcibers, Nott, Pettigrew, Black, Greyback, Snape, Rowle, Travers, Wilkes, Macnair, and Yaxley.
Other funny friend - "the death eater has arrived"
Funny Friend "we need to get someone to change the music to really loud and get the heating on really high, it's freezing in here!"
Other funny friend does not reply as they have sadly encountered Death Eater, has fainted and is having their very soul sucked out of their mouth