In English we get a bit confused sometimes because we have two words, belief and faith, for the same thing. Especially because we also use the word "faith" to mean a religious institution. Lost in the vocabulary confusion is the idea that the definition of a religion is believing in and worshiping a superhuman power. Did you see that those are both verbs? Action verbs, in fact? Things you can do or not do and so the products of free will.
Because you can believe or not believe, worship or not worship, faith is a choice. Any claim that a faith can be "involuntary" is anti-faith. If you can't freely choose to believe and worship, you are trapped in a "mind prison"* and have no ability to exercise faith.
Recent efforts in some strains of Islam to approve and promote death to apostates from Islam is destructive of Islam itself. The first pillar of Islam is faith. A shahada, declaration of faith and trust in Allah, is empty words if not freely chosen. The coercion of a death sentence basically takes away free choice. God doesn't want slaves; he wants faithful servants.
Those who preach death to apostates are destroying Islam as a religion. Those who love Islam need to stand up for it being voluntary. Until they do so, they can't expect those who value real faith to respect Islam. All its practices (esp. obvious ones like the hijab) will seem like trappings of slavery as long as Islam is difficult to leave. Indeed, the western world cannot respect Islam if it resembles slavery, for the western world has abandoned slavery almost entirely over the past three centuries.
Asserting the voluntary nature of Islam would also help decrease sectarian violence within Islam, for different sects often consider each other apostates worthy of death, which tends to make peace harder to restore. Christianity had its period of forced religiosity. It led to horrible conflicts and injustices, and the result is that many in Europe and European-influenced countries turn away from God altogether. I hope the Islamic world can learn from Europe's past and abandon coercion in matters of faith.
* As opposed to Sherlock's "mind palace."