No, it really is dismissive to assume that she committed suicide because she lacked religion, particularly building it on the thin evidence that she was a liberal. Many liberals are Christian. They simply focus more on Jesus as compassionate to the poor than on Jesus as a conduit to personal responsibility.
“Many liberals are Christian.”
I’ve never met one. Although there are people who put on funny clothes and pretend they have some vague association with Christianity. But even there...I’ve never met one in the flesh.