The main issue is that religion is something that makes you feel better when you have emotional pain, like a loved one dying. Like any painkiller, it has a purpose and if you abuse it you can deaden your response to actual issues that need your attention.

Originally Christianity was mostly about helping the poor, sick, dying, etc. That genuinely makes you feel better about yourself. Judaism has a lot of references to remaining strong in the face of adversity. Religions are just mental tools. What you do with that tool is up to you. If you hurt other people, it’s your fault.