6 Dr. Seuss books won't be published anymore because they portray people in 'hurtful and wrong' ways

[Silver1]

43. I always thought he was ...

and I just looked into it to double check a few days ago when all this hit the news. Here's the source which states he was of Jewish descent:

https://leslie.dartmouth.edu/news/2017/02/real-doctor-seuss-cartoon-1941

"Seuss, of Jewish German descent and raised in Springfield, Massachusetts, was devastated by Adolf Hitler’s rise to power and similarly outraged by America’s initial ambivalence to it. “I think he just got mad,” Judith Morgan, coauthor of the book Dr. Seuss and Mr. Geisel, said in an interview with The Atlantic. “He saw the growing threat in Europe and thought the Americans were not paying attention.”

Other sources say differently but sites that aren't necessarily reliable. I saw in a few places that as a kid he was discriminated against for being German Jewish. The same when he arrived at Dartmouth where he then identified as Lutheran.

Perhaps as he was predisposed to communist ideals, religion was not especially important to him hence the lack of clarity about it.