This is mostly for Servant19 (I apologize for not knowing, or even trying, to use the website tools to respond directly – it’s late, and I need sleep, but I wanted to share, too).
You can’t take the attitude, “All religions are okay; you’re okay, I’m okay, we’re all okay” when you talk to, deal with, a Muslim who is serious about his faith. He will interpret your tolerance as openness, and try to convert you, because that’s what his religion teaches (sharing the faith is the first pillar of Islam). Muslims are sincere, but they’re also “conversion robots.” It’s just something they do, religiously.
I know this is true, because I’ve worked with Muslims, and very sincere ones, at that. I’m thinking of one in particular, named Jafar. You could say of him what St. Paul said of himself: “when it comes to righteousness stipulated in the law, I am [nearly, in Jafar’s case] blameless.” This guy is naturally better (I think) at following rules than I am, in other words (however, we aren’t justified by conforming to an outward rule – it’s faith; faith in the sacraments, faith in Christ). Anyway, I tried to take the angle with him that the CCC teaches, which is to say that, “Hey, we’re on the same team, and we can learn from each other.” He took that as an opening, and proceeded to proselytize me for months. I finally had to draw the line, giving back his Koran, and letting him know that we could be friends, but I wasn’t going to become a Muslim (I actually haven’t done this yet, but I plan to do it tomorrow).
This is the point: all Muslims that are serious about their faith believe that Christians are practicing a false religion. They all do. They don’t extend the same generosity to you that you are trying to extent towards them. You need to realize this. They don’t sit there and say to themselves, “Well, maybe Jesus was and is the Son of God – perhaps those Christians are right about that.” Their Koran denies the Divinity of Christ. Anyway, they’ll take your generosity and interpret it as you being open to conversion. They’re extremely “conversion” focused. You have to, firmly, and as with as much love as possible, let them know where you stand, and that you’re not open to becoming a Muslim; sometimes, too, I think, you may have to fight fire with fire. They believe our religion is false – we can, I think, believe the same thing of theirs (with, perhaps, a few qualifiers – letting them know where we believe they’re on the right track, if your faith is strong enough to do this). Regardless, this whole PC attitude of accepting all religions isn’t something any serious Muslim adheres to; if you want to help convert Muslims, you need to be as convinced, or more convinced, that the religion of Christ is the true religion than they’re convinced that Mohammed was a prophet. You have to speak their language, in other words.
Think of it in terms of our relationship to Protestants. Protestants are much more likely to come into the fullness of the Catholic faith if they see Catholics reading the Bible, and knowing it from cover to cover, just like they try to do. Muslims are much more likely to convert if they see Catholic Christians just as firmly convinced in the truth of our religion (and more convinced, actually), than they are with theirs. This is one of the truths of evangelical work: you have to speak the language of others, and be like those you wish to evangelize (without sinning). If that means being even more Bible centered than Protestants, so be it. If that means being more convinced of the authenticity of the Christian faith than Muslims are convinced of the authenticity of theirs, so be it. Of course, we can do nothing apart from Christ and His indwelling Spirit.
Anyway, all this is to say that your attitude won’t hold up in a conversation with any Muslim worth his salt. He’ll grab hold of your openness toward his beliefs, and hound you till you convert to his religion, or finally grab firm hold of your own. Muslims often catch a glimpse of the Charity of God, though. And it is possible to use their religion to help them towards the truth. Better to draw a firm line in the sand, however, than waffle too much and let them think they’re the ones doing the converting.