That true But there are some exceptions, like Orks. They don't fight against other "evils". They fight because they are born to fight and they like to fight, wage war and so on.... For the Orks, the other races/factions are only enemies to fight. If there are no "enemies" for the Orks, they fight among themselves
There are differences between the factions; the Imperium of man, Chaos and Eldar/DE are all fighting based on their own view of morality, with the view that all other factions are abominations. Orkz have no morality, either good nor evil, they don't see the world through codes of honour, for them it's either fun or boredom, they don't want to win a war they don't want to lose one, they just want to fight one. The easiest way to defeat Orkz is to make the fight boring (like a siege) as they will just pack up and leave. Other races like Tyranids fight on instinct and for propagation and survival, they also have no sense of morality only of survival.
"Travellin' through space is boring. Well, boring unless da hulk yer on is full of dem gene-sneakers, or a base fer da chaos lads wiv da spikes, or already has Boyz on it. Or if humie lootas come callin', that's always good fer a bit a sport. Or unless yer have a mutiny or two to pass da time, or unless strange fings start happenin', which dey usually do when yer out in da warp. One time we had some bloody great ugly fing come straight out of Weird Lugwort's 'ed! It butchered half da lads, that was pretty entertainin'. Come ter fink of it, space is a pretty good larf. And that's before yer find yerself a nice world ta crush!" Bigmaw, Ork Runtherd (Ork Codex 4th edition).
Like what? I probably should have been more precise. As long as they contradict horrible ideas such as "perpatuals" and reinforce the concept of distortion by myth and legend - both from the 6E rulebook's section on Primarchs - I am glad. As Gav Thorpe has mentioned on his blog, GW is certainly not above adopting stuff from novels that they think fits into their own vision. At the same time, they also have no problem dismissing things where they believe it doesn't synch. The ultimate decision, however, rests with the individual gamer/reader, as we are all supposed to "cherry-pick" what we like most.
The entire section on the Heresy and the history of the Legions is full of Black Library content. Hell, even the backgrounds of the special characters have the same. We're all free to pick what we like from the editions that we were exposed to, but we have to accept that younger players aren't going to understand. If you'd just start playing in 6th edition then you wouldn't see any contradictions between the codices and the novels (the way there used to be).
That's a very ... broad statement. Does it say anything about Perpetuals, thus contradicting the 6E rulebook's statements? Does it talk about Primarchs being just about unkillable and pulling off really silly feats of strength such as lifting Titan legs or resisting Titan-grade plasma weaponry? Quite a lot of the stuff in the HH novels actually references stuff that GW studio material did talk about before, just in more obscure sources known by fewer people, such as the White Dwarf Index Astartes articles. It's the additions and changes that personally worry me, as I feel that those novels are pushing away perception of the setting towards a comic book universe. -_- Yes, that is the sad truth of it, though this has already been an issue for several years now since the novels gained in both amount and popularity. From what I regularly read on 40k forums (including this one), most fans are not even accustomed to GW's version of the fluff and go solely by something it said in a licensed product. Just yesterday I saw yet another fan in the Space Marine subforum claim that Astartes are 9 feet high. Sigh!
I still have some high hopes for the Tau considering they are one of the youngest, but highly technological races in the galaxy (right next to Eldar and Necrons), though their "Greater good" could use some work.
Yeah I've argued against that point many times, 7 to 9 feet tall ..... Back in the 1st and 2nd editions they were human sized, 6 to 7 feet tall in armour, Orkz were monsterous and towered above them (Nobz that is not the boyz) and Ogryns dwarfed even warbosses and could rip the head off a terminator with their bare hands.