LV's philosophy

[Luckdragon]

No: HPFGUIDX 146279

Luckdragon:
Exactly what is LV's philosophy?
In the first book I was under the impression that he wanted to wipe 
out anyone or anything that was not a pure blood witch/wizard 
despite the fact that he himself is not a pureblood.
Next we find out that he is controlling/working somewhat 
symbiotically with the dementors who are neither human or magical 
beings.
We also find out that at least one of his deatheaters is a half-
blood; and that he is also courting giants, werewolves, etc. to join 
him in his quest. 
Lastly LV has damaged his soul so much that he no longer even 
resembles a human being.
So how is it that all of his followers and affiliates do not realize 
that LV is out for himself alone and really has none of their 
interests at heart. How is it that they blindly follow someone who 
goes against his own philosophy by accepting these other creatures 
into his fold. Why do the pureblood community, who have wizarding 
geneology at their fingertips, not know that LV himself is not a 
pureblood and accept that a halfblood(Snape) is seemingly high up in 
LV's band.
What will it take for everyone to realize that the philosophy touted 
by LV is a load of bunk?