Doubt in faith has been in existence over many years ago.
Looking at the problems that caused doubt in the faith of
Nigeria Christians, let's look at this issues below.

1.Expectation: people tend to be Christian cos of the
problems that emerged in their life. And seeing others people
giving testimonies in every daily life then that motivated
and encouraged them to follow the religion. Infact, most of
Nigerian societies who are called Christians today are people
earliest before now believed religion can solve their
problems then what happens when the expectation never met up?
They doubt and lost faith.

2. Fake Men Of God: with how people view the religion
(Christianity) as problem solver. Some intelligence tend to
take advantage as seeing people rush to get miracles. These
intelligence called men of God pretend to be dine and wine
with God, make people believe they hear from God and perform
miracles so as to extract and extort money from these
believers. Then people doubt and lose faith when they being
deceived by this men of God.

3. Controversy In Bible: Bible itself has different versions
that have different explanations. And these explanations
differ, people tend to get confused when they can't
comprehend what they read. Sometimes, people feel as if these
bible versions are against each other cos of the nature of
explanations and so called men of God interpret the bible in
favour to extort money. This aspect also causing doubt in
faith.

4. Excess of churches around: before now we can easily count
the number of churches in a particular town but now in
present day, is countless. Everyday new churches emerged with
funny names like God's Own Church, Fire Omega ministry, Hope
in God Ministry and so on. The questions are,  where
these people were worshipping prior to this opening of
churches? Why can't they remain there so as to make people
believe God is one and he can sight you anywhere you are?
These church openers bring confusions and anxieties among
Christians and make them to doubt and lose faith.