At first I was going to write about Islam in particular and my feelings on it. After giving it some thought, it seems to me that it will be more helpful if I explain how I view other religions. Otherwise, anything I write will probably only serve to muddy the waters further. I am sure that at least some readers may feel insulted by what I have to say but please note that is not my intention. I am not being arrogant, only honest.
As a Christian, I believe that there is only one path to God: Jesus Christ. You must believe that He is the Son of God, God in human form. He loved you enough to die for your sins. You must accept His gift of salvation and walk in humility and repentance before Him.
I also believe that all other religions are false.
All of them.
Not one will lead you to God.
They may make you a better behaved person, but that is it.
I believe that heaven and hell exist. Some people are going to heaven and others are going to hell. Who is going where is not up to me, but up to God. Since I also believe that the only way to escape hell is through Jesus Christ, it behooves me to tell anyone who doesn't know or doesn't believe that they must change. I am not doing this out of some twisted sense of judgment, arrogance, or dislike for people. I do it out of love for others and out of a sense of obedience to God and gratitude for what He has done for me.
When I write about other religions I do it from a sort of academic view point. I look at all other religions through the lens of my own and consider what is good or useful about the religion, if anything, and what is bad. If I don't understand why a particular religion has a particular belief (as with my questions on the kirpan), then you can expect me to ask about it. If I feel a belief is wrong or harmful, then I will say so. I am not good at being tactful, so usually if I say "Belief X has the following problem" it comes out sounding rude.
I cannot separate my Christian beliefs from myself when I consider other religions. I cannot change my world view, and this extends beyond how I look at religious beliefs. It also includes lifestyles. I do not believe that what's good for me is good for me and what's good for you is good for you. I do believe that what some people think is good for them, is in fact very bad for them. I will always look at other practices through the lens of what I believe and any judgments I come to will be based on that lens.
Considering all that I have just said, it should not surprise anyone that I will occasionally say "Belief X is bad." Any adherents to "Belief X" will naturally feel insulted whenever they read this. Please keep in mind that although I may think your beliefs are wrong, it is more than likely that in person we would get along just fine. Wgile I may take issue with certain beliefs, individuals themselves are usually just fine. Moreover, you will never catch me saying "You are stupid for believing in X." That really would be insulting. There is a big difference between saying someone is wrong and insulting or belittling them for being wrong. The same beliefs that tell me you are wrong also tell me to extend grace.
I hope this has helped to clarify where I am coming from in any religious posts I make.