Going back in time within the story here.
https://www.youtube.com/watch?v=uhdpbq7mE5A
So Anubis wanted to do the same thing the Alterans did, except that he wanted to murder an entire galaxy using the Dakara weapon for his own reasons.
It seems illogical to make this decision at first glance, so what could have been his possible motive, other than him being an evil goa'uld with a black and white personality?
I can only speculate it's something he's learned through the Alterans during his time with the ascended Others and what he needs to do in order to maintain his foothold of the galaxy.
from what i understand, Anubis knows nothing about the Ori, but at the same time it's possible that he does know about them and how they maintained their power by using people as worshippers, it could be that he was going to use it as a possible bargaining chip for the Ori and take out the Others along the way and then use the Dakara platform to repopulate the galaxy as the Dakara device has been known to be capable of and using the new population to gain his ascended power like the Ori do.
Or perhaps he was planning to recreate the circumstances of how the Ori came to power and create his own rule and priors to overthrow the Others.
The originally planned video game of Stargate Alliance was supposed to be a continuation of Anubis's story within the show, without knowing what that story was about, it's possible that this was one of the routes that the show was going to provide in the form of a video game.
Also, what was the purpose of Anubis's clone body of himself, named Khalek? is it possible to clone yourself to worship yourself i wonder? it sounds silly, but it's a possible outcome right?
Khalek was created with abilities almost identical to the Prior's of the Ori, so it's possible this could have been the motivation in why this clone of himself was created.
What do we know of Anubis? he clones his own Jaffa army in the form of Kull Warriors to only serve him through his Queen's design, these warriors are programed by the Queen to serve Anubis, so it's possible that they can also be programmed to worship him as well.
While Anubis is speaking to Ba'al
"First i will retake Dakara, then I will destroy every living thing in the galaxy, including you, all at once"
"You have no way of knowing what is necessary, and what is not in My Grand design" Anubis.
But of course we don't get this information in the show's story, but this is what i think of Anubis's possible motives, what do you guys think on this part of the story?