goodnews:
Being a theist doesn't make someone religious. Having a religion makes someone religious. You can be a theist and not have a religion because theism isn't a religion. You can be an atheist and have a religion, but the religion can't be atheism, because atheism isn't a religion any more than theism is.
For example, I am an atheist with a religion. My religion is Unitarian Universalism.
You could say someone who goes fly fishing every Saturday is religious about it, but that's a very different sense of the word.
Being a theist doesn't make someone religious. Having a religion makes someone religious. You can be a theist and not have a religion because theism isn't a religion. You can be an atheist and have a religion, but the religion can't be atheism, because atheism isn't a religion any more than theism is.
For example, I am an atheist with a religion. My religion is Unitarian Universalism.
You could say someone who goes fly fishing every Saturday is religious about it, but that's a very different sense of the word.