Forced conversion is not conversion. I was a Christian believer about the age of 5 years old, made that decision public at about 11 or 12 years old, had plenty of time since then to question the authenticity of my faith, and have no reason at all to believe differently now than I did then. Your parents cannot "make" you a Christian, Muslim, Jew, Hindu, Bahai, etc. at any age. Depending on what a religion teaches, you can slip in and out of some like changing your underwear. I happen to believe that there's only one true religion. If you are able to abandon Christianity, you were never really a Christian in the first place. My children all wanted to profess their beliefs early, much earlier than I did, and we watched out children struggle when we insisted that they wait. It was a "losing" battle in the end, but we really did work harder to talk them out of becoming Christians. We wanted to be sure that decision was entirely theirs and not ours, and we frequently enjoy discussing religion and the Bible now.
I've known kids who "grew up Christian" or Mormon or something else and ended up leaving it for one reason or another. I've noticed ex-Mormons in particular seem to be especially resistant to ANY religion, mostly due to bad experiences in the LDS church and feeling they have no reason to think any self-professed Christian church would really be any better. Ex-Christians of various denominations usually "deconvert" because of similarly bad circumstances, or something like their parents divorced when Christians are supposedly so anti-divorce. There are all kinds of reasons, yes. But it seems to be a lack of understanding why bad things happen to good people, that they don't really see or understand God's providence in their own lives, and rejecting God because, basically, they didn't get what they prayed for. Faith is faith and is unconditional by nature. With faith, you either know something or you don't. You either know God exists or you don't. If you KNOW God exists and accept God's existence along with everything else that goes with that, you can't possibly turn away from your faith. Your knowledge compels you to believe. To apparently abandon God, one either has to conclude God doesn't exist after never knowing for sure that God does, or one gives in to wishful thinking--an agnostic idea that maybe God does exist, but he's irrelevant. You KNOW God exists, you just don't WANT him to exist.
But it still boils down to a conscious decision to accept or reject God. I don't know Islam well enough to say how this applies, if at all, but just like I always thought it was risky that my own kids wanted to become Christians at a crazy-early age, forced conversions and early conversions in ANY religion make entirely too many presumptions about the minds of individuals and how things change as people get older. If you're questioning a Muslim upbringing, I'd say that's a good thing. My faith does not teach that you're going to hell for rejecting the religion you were brought up in. If you CAN doubt your faith, that's a strong indication that something might be wrong. The main point is that's not something your parents or even a government can do for you.
I'm simultaneously amused and disturbed when I hear about young people being forced to convert to something. I would rather die than be forced to be something I'm not. But at the same time children never really have a choice when it comes to adults who make decisions for them. If a child is just saying all the right words and performing all the right rituals because that means they stay alive, that doesn't mean they are genuinely accepting of the religion behind all those words and rituals. You can do all sorts of things to keep up appearances when you're actually secretly networking with others who can only practice their faith in hiding or underground. If you were converted as a child but really had no will to believe or follow your religion, were you really converted? Even the Muslims I personally know will say you have to make up your own mind about this stuff.
On a side note, it's interesting to me that Muslims tend to be much more supportive of new converts to their religion than Christians are to ours.