"Jesus and Satan are spirit brothers and we were all born as siblings in heaven to them both, (Mormon Doctrine, p. 163)
I did a search of that phrase. It was quoted many times. While I didn't see it from any official Mormon site I did see it from;
christian apologetics & research ministry (whatever the hell that is)
RUSSPICKET.COM (if Russ Picket says it, it MUST be true!)
members.tripod.com/ApocryphalText/Mormonism.htm (your own website for $1 a month)
theapologiaproject.org
and
comicscommunity.com
I did find this from Yahoo Answers from a Mormon however, "God had a plan already. Satan proposed an alternate plan in which their would be no free will (agency) and Satan wanted all of the Glory, but Jesus said he would do what the Father wanted, giving the Glory to the Father.
The argument that Jesus' brother is Satan is used a lot by people trying to defame Mormons. We believe all people are God's children, including you. This also makes you Jesus' brother, as well as Satan's brother."
This sounds like what almost every faith believes(including yours I would bet), that God created everything. However in context of your charges it basically it sounds to me like you are regurgitating anti-Mormon bias as "facts".
"God himself was once as we are now, and is an exalted man, and sits enthroned in yonder heavens!!! . . . We have imagined that God was God from all eternity. I will refute that idea and take away the veil, so that you may see."
"God the Father had a Father..."
Yup...Joseph Smith said that in 1844. Again my only source though was anti-Mormon sites. Keep in mind that Martin Luther had a lot of funny ideas too. However unless you are Roman Catholic then it is fair to paint you totally with the brush of Martin Luther if you are going to paint the Mormons with the brush of Joseph Smith.
"God is married to his goddess wife and has spirit children, (Mormon Doctrine p. 516)"
"The first spirit to be born in heaven was Jesus, (Mormon Doctrine, page 129)"
"We [the First Presidency of the Church] decided that Bruce R. McConkie’s book, ‘Mormon Doctrine’ recently published by Bookcraft Company, must not be re-published, as it is full of errors and misstatements, and it is most unfortunate that it has received such wide circulation.--LDS President David O McKay January 8, 1960
"No woman will get into the celestial kingdom, except her husband receives her, if she is worthy to have a husband; and if not, somebody will receive her as a servant” (Journal of Discourses 5:291)"
Well...this was said by the world famous Erastus Snow in 1857.
However you said earlier regarding this, "I have had more than one Mormon wife cry on my shoulder because they lived with the fear that on that day when their Mormon husband is made God over his own planet - that he might not ask him to join her". Now frankly I'm having a hard time buying that. The BS meter went off in my head when I read it and I'm still not buying it. (don't send me a "are you calling me a liar" reply because you already know the answer.)
Thanks for your time. I cannot believe I just spent this much of what could have been quality time answering your bigoted charges.