Belief in God among the major religions is similar. It is the kind of God that is being venerated that is different. Belief in God is based on faith. In this respect, all religions should be the same, but differences occur when descriptions of who or what God is start.
Religion is so many things to many people; but summarizing all the kinds of beliefs in God, we can say, in no order whatsoever, that
1. God is beyond our comprehension
2. There is a hierarchy of Gods
3. There is only one God
4. God is everything
God is Beyond Our Comprehension
According to Buddhism, we, as man, cannot comprehend who or what God is. It is like, as Buddha said, a sick man refusing treatment until he had understood the ailment. This is one reason why I was attracted to Buddhism; it admits that by itself it can never fully explain who God is and it never makes any attempts to. It does not personalize God with attributes common to man: jealousy (by worshiping other gods), forgiveness (can He be hurt by us?), kindness (what about all the oppression going on?), bribery, flattery and the like (offerings, adulations). Everybody is free to believe in Him or not, and in no certain terms am I saying to stop believing in Him; on the contrary, belief helps us keep our sanity in this troubled world.
How lucky it would be for mankind if God appeared or spoke to any of us but let us stop our wishful thinking for it will never be. It is so comforting to think that He is our loving father, but is He? Does He really care? What if I say no? that we are left in this world with our own devices? This thought should not make us knock-kneed; on the other hand it should make us feel responsible and mature that we control our own destiny.
If I say that God is not a kind loving father, neither am I saying that he is cruel, unjust and unkind. There is no general chaos, however, despite God's seemingly being detached from us because there is a universal law of cause and effect. Did God make this law and reincarnation for us to follow? The law is there, it exists and affects all of us. Upon accepting that God is beyond our comprehension and that He is detached from human affairs, we cannot blame, thank, credit or leave to His will our misfortunes or gifts in life.
This section should really be self-explanatory. Is there anybody who can say that he knows God? Show me a man, who is sane, who can claim that he is in contact with God or that he is taking instructions from Him or that he can feel His presence and I will show you a flying elephant. Without stepping on the toes of other religions, miracles, it seems, if we keep an open-mind, are dime-a-dozen. There are more fantastic miracles in Buddhism and Hinduism than in Christianity but belief is not a matter of which religion has the greatest miracles because for the learned and educated, these are, in modern parlance, promotional materials for the religion. It is a come-on, a way of getting converts, and keeping them once they start to believe. I have nothing against in propagating miracles in keeping the belief alive among the unlearned and unsophisticated populace during the early times, but to use these as arguments and justification until today as acts of God is begging for explanation.