What are some cited evidence that Liesel was not justified for stealing books?

Liesel shied away. “No,” she said, “thank you. I have enough books at home. Maybe another time. I’m rereading something else with my papa. You know, the one I stole from the fire that night.” The mayor’s wife nodded. If there was one thing about Liesel Meminger, her thieving was not gratuitous. She only stole books on what she felt was a need-to-have basis.

It’s no time to be half watching, turning around, or checking the stove—because when the book thief stole her second book, not only were there many factors involved in her hunger to do so, but the act of stealing it triggered the crux of what was to come. It would provide her with a venue for continued book thievery. It would inspire Hans Hubermann to come up with a plan to help the Jewish fist fighter. And it would show me, once again, that one opportunity leads directly to another, just as risk leads to more risk, life to more life, and death to more death.