Merits
State can not interfere in any of the religious beliefs.
One is free to practice any religion he/she wants to.
People of same religion have common mind set.
Maintains the existence of all the religion in the society
Demerits
Political parties take advantage of this by influencing people in wrong way.
Minnor community always have fear of getting supresed by major one .
Different religion have different laws and norms of there own as state has no interference