Smule is indeed created for people to sing together, have fun and express themselves. All of our users have the freedom to express themselves as long as what they say is not hurting other users. We don't want to encourage any kind of negative behavior but we do support you to express yourself freely as long as no one would be harmed by this. We want all of our users to feel safe here.
Religious and political views can always be discussed as long as it does not lead to conflicts and strong opinions being imposed on others with different views. If you find someone who shares your interests you can always connect with them and discuss any sort of views or opinions on any topic and matter.
Please keep in mind that only you are responsible for what you say and express and words can be hurtful if not used the appropriate way.