Refutation: God Gives Me Meaning

I ask for rational reasons, or at least one good reason, for believing in God when I chat with theists. After theists say that there is no evidence for God (as few actually do), they run an argument very akin to this to warrant belief:

God gives me purpose in my life. He allows communities to unite, work to reach a common goal, and has good advice for us to live. So many people I know have been touched by belief in God and it has changed their lives.

This argument is littered with various issues:

It is a non-sequitur.

Beneficial results from a belief does not mean that the belief is true. Truth value is not substantiated because beneficial results or good feelings are gained from some idea.

A belief is not good just because it's good for some people.

Some people believe that immigrants are inferior to "real Americans" and should not be in the United States. This belief might give purpose, direction, and validity to peoples' claims against foreigners, but this does not mean that the belief is automatically good.

Some people may really love abusing alcohol and taking heroin and claim that it makes them feel good and produce desirable results. The idea may be harmful, many contest, but it makes me feel wanted and relaxed.

Religion is not good for all people and it's often harmful, save, perhaps, moderates who don't do bad things.

If you're going to allow this claim for yourself, you'll have to allow it for everyone else.

Religions make various incompatible claims such as Islam and Christianity: Muslims don't believe Jesus is divine while Christians believe that Jesus is. We can't allow personal experience arguments like this to warrant one belief and not the others. If you allow a claim for yourself as a Christian and then allow it for a Muslim, you have to distinctly incompatible views. They don't can't be true.

I have a diamond in my backyard

Sam Harris masterfully eviscerates the argument I provided with his diamond in backyard example:

Why do we have to believe things on no or insufficient evidence to have these experiences?

Any person, religious or non-religious, can have meaningful experiences that are not contingent on belief.

Placebo Effect

Perhaps it's just that your belief is functioning as a placebo to enable and explain good experiences and it's just all false. I'm not denying that you believe it to be true, but is it really?