The naive answer:
Christians are better than non-Christians.
The problem with the naive answer:
The facts and data show that societies with stronger religious beliefs are rarely better than secular societies by almost any measure. Many individuals that have performed horrific acts of violence have been Christians.
The scholar’s answer:
For society, religion can be used to encourage good behaviors, but it also is the best tool for fostering discrimination against others as well as harsh judgements of others. These negative effects, present in societies with strong religious beliefs, lead to poorer outcomes on average for much of society. For individuals, religion can lead some to become more tolerant of others, but it can also provide reasons for some to become more intolerant and violent toward others.
Here are a few examples showing being Christian is not better than not:
Logically, we can conclude that living in a Christian society is not better than living in a secular society. But studies show that societies in which everyone has very similar beliefs are stronger than societies where there are differing beliefs. When a society has multiple belief systems, it is often slightly better for the belief system in power and much worse for the other belief systems, and the average is worse than secular societies or societies with a single belief system. Furthermore, religion may help some individuals become better people, but it also gives justification for some people to do more harm to others.
Some references for further research: