Religions can be harmful for certain dumb people who believe them. It’s not a given, but with the interconnectivity of today these dumb people can organize and create echo chambers, and be much more harmful to both themselves and others. A stark, anti-religion stance seems harsh, but it’s likely the most effective way to avoid these pitfalls.

I would not say religions are bad when people consider real life more important. However, any form of religious radicalism is terrible and also when religion is combined with politics.

There is nothing bad about following some religious tradition (such as all saints day or christmas) but pls don't take religion too seriously. Edit: corrections