Religion itself is not automatically good or bad. Christianity, Islam, Judaism, Hinduism, Buddhism and other religions have millions of ordinary people who find meaning, comfort and guidance in their beliefs.
The problem often begins when people use religion as a reason to mistreat others. A person can use the same religious teachings to become kinder, more disciplined and more generous, while another person can use religion to justify hatred or control. That does not necessarily mean the entire religion is responsible for every action committed in its name.
It is also important to remember that religious people are human beings. They can misunderstand their own teachings, make mistakes, become hypocritical or behave badly. Judging an entire religion based on the actions of some of its followers can be unfair.
At the same time, questioning religion is not automatically disrespectful. People should be allowed to ask difficult questions about religious beliefs, traditions and institutions. Faith does not become stronger simply because nobody is allowed to question it.
A healthier way to look at religion is to separate the belief itself from the behaviour of individuals and institutions. If someone uses Christianity to help others, that is their choice. If someone follows Islam sincerely, that is their choice too. Someone else may reject religion completely, and that is also their choice.
No religion should automatically be treated as evil simply because some people have done terrible things while claiming to follow it. Likewise, no religion should be considered perfect simply because it teaches certain good values.
People should be judged by what they actually do, not by assumptions about an entire group. Religion can be meaningful to someone without needing to be meaningful to everyone.