It seems to me that most people's religious beliefs are those they assimilated as children, or were indoctrinated with by their parents, peers, community and culture.
That is no a healthy Faith build on solid ground.
Many others seem to adopt or adhere to religious beliefs as a result of fear, including fear of death, of the unknown, and fear of their own ignorance (with the realization or understanding that they don't know everything).
Never even enters my mind in Faith, it is never a reason to accept a Faith - It is Love
Admittedly, some seem to adopt some kind of religious beliefs in order to cling to the idea of some type of benevolent force in the universe, or something in control or guiding them during times of great personal need, desperation or confusion.
It is about becoming aware of the One Force that has created us and sustains us all. This can be realized at any time, but it takes great personal hardship, sometimes, for people to find this source.
Are any of these good reasons to accept any particular religion and its beliefs?
No
I tend to be suspicious of people who ardently defend their religious beliefs despite evidence to the contrary or lack of evidence, because it often seems to imply that at some level of consciousness they are aware that those beliefs might be wrong, might not conform to reality.
many people will not look at the evidence provided. God gives a Messenger and it is them that is the proof, they are not men like us. So they offer themselves as the proof. Their person, their lives and then the Word. That is all the evidence that is needed. It is they that guide and shape the world with these 3 things. Even if a person has not chosen to look and accept that.
So one can look back the see how a Faith Started by Noah, Abraham, Moses, or Buddha. or Jesus, or Muhammad or Krishna, or Zoroaster, or the Bab or Baha'u'llah has shaped mankind mind and their chosen path in life. Apart from these, who else still rules over the mind on men, except those that make themselves a God and try to dominate thought? Those that do it without the guidance given by a Messenger from God become names such as Hitler, who have a short but negative impact. Also Faith that does not do as a Messenger asks, also comes a cause more orientated to doing more bad than good.
I suppose however that when there are so many competing religious belief systems, it seems natural to feel challenged or threatened by all of them other than one's own.
That is a simple change in ones frame of reference. All True Faith comes from the One God, the Creator of us all. All we have to do is embrace the Truth given in all God given faith. We are our own worst enemy in achieving our unity.
As for myself, raised as a Christian but now not affiliated with any religion, I try to examine and question my own beliefs periodically, and to learn instead from my own experience.
That is the way, independent investigation of the Truth, Jesus the Christ said test all things and Hold on to what is Good. that is the key, as all good is from God, all evil is lack of that good and from our own selves.
Regards Tony