However, we need to begin at the beginning. Did you ever notice that there many folks sitting in churches who have no concept of the Kingdom of God or of spiritual matters. They are religious people.
Religious people are faithful to their system of belief, or what they understand to be spiritual.
Usually a formal style of worship. Organized religion has a wonderful form of worship but has no understanding of the spiritual side of God's kingdom. Many places in the scriptures it speaks of the Kingdom of God and also the Kingdom of Heaven. Well the term Kingdom of Heaven shows us where it is from and the term Kingdom of God shows us who runs it. So there is no difference between these two scriptural terms.