Different religious groups pursuing their own religion often are individualistic and tend to wage conflicts with people of distinct religions, given their unalike beliefs,culture and views!
So, if we want less conflicts to spring up from different religions...It is better to introduce diverse cultures in the curriculum which would aim at filling religious gaps between people and MAY attempt to close the conflicting bridges among people as the students at a very young age would be acquainted with distinct religions. These students would grow up to become amazing assets to the country and hence the world!
Howevwr, it may not be possible to acquaint these range of religious sttudies in the parametres of sylabus as it may need recruitment of teachers from around the world which may be a hassle to the government budget!
This is because most of the schools around the world do not provide this exposure which automatically limits the ability of students to even have their free will expressed with regard to their liking towards a religion. When students are educated about religions, we are automatically preaching that all religions have their own principles which are not wrong and we tell them all religions are equal. Hence this is a morally right implementation.
While I do not dispute that studying about world religions is a beneficial endeavor, the competition to add content in the curriculum is too great to afford such inclusion. Teachers are already hard pressed to fit in all of the current mandated outcomes and subject matters into a very finite amount of instructional time. Even at the University Level, where most students are free to take courses in Religious Studies according to their own interests, very few do due to a scarcity of elective credits available after the required courses for most majors have been scheduled. If this is already a great challenge at the University level, then it is certainly virtually impossible to achieve at the high school level. Furthermore, finding specialists to teach Religious Studies in the classroom (a non-recognized specialty) would be next to impossible keeping in mind that Religious Studies majors typically are few and far between and typically do not go on to become public school teachers.