Wa alaykum el-salam!
Welcome aboard. Hope you have a nice stay here!
Just want to say one thing pertaining to what you hope to achieve:
For your first one, all I can say is 'good luck'. I've done all I could in that department and it didn't make all that much of a difference...at least not to the people I was directing my conversation at. I like to think that anonymous readers have read my posts on this topic and at least accepted a different point of view...'cause that really didn't happen much whoever I was posting to. Maybe you'll be more convincing, who knows?
All I can say is, you're dealing with a very tough audience here.
Oh and as for your second item...that kind of a discussion would not be a very good thing to have on this forum. Here's a little something from the forum's Terms of Service:
1 - This is a Christian site, therefore, any attempt to put down Christianity and the basic tenets of our Faith will be considered a hostile act.
We consider Paul's writings to be part of the inspired Word of God. This is a Christian forum and any posting(s) that is intended to purpously distort Paul's writings will not be tolerated.
3 - No active promotion of other Faiths is allowed:
You will not post any messages; links, images or photos that promote a religion or belief other than Biblical and historical Christianity (atheism is considered a "belief" for the purposes of this rule). Discussing these doctrines are fine, as long as the beliefs are not actively promoted. This includes Universal Reconcilation and Univesal Salvation This is a Christian Forum as the name suggests.
That pretty much means that discussing one religion as truth over another can get you censored or banned. If you want to have that kind of a debate, I think you can do it via PM-ing a willing member or do it in a multi-religion type forum. When I was talking about Islam I only tried to clear misconceptions but I NEVER said it held more truth than Christianity. (And hope I never came off as sounding that way.) Remember, you are on a Christian forum and are speaking with devout Christians. It's never a good thing to tell them that they don't have the whole truth when you are on their turf.
Just thought I'd let you know, since you're kind of embarking on a path I'd already taken. Welcome again and happy posting!