It is certainly fair to see in Nazi Germany a manifestation of what is intended now by the phrase "a culture of death", and, in this sense, to see anti-Nazi resistance as "pro-life" in a broad sense.
But, so far as I can determine, it is quite misleading to represent the White Rose as if they were in some way a precursor of today's movements of opposition to abortion and euthanasia. I am therefore somewhat irritated by the attempt to assimilate their motif of the "White Rose" to SPUC's symbol of the "White Flower".
The first literature the group distributed was the famous 1941 sermon by Bishop Clemens von Galen, Catholic bishop of Munster against the Nazi euthanasia programme. ....The students took a white rose as their symbol, to represent purity and innocence in the face of evil.
John Smeaton's source appears to be this website, but I have not been able to verify (either in print resources available to me or in internet sources) its assertion that the "White Rose" distributed Bishop Clemens von Galen's sermon, or that their first leaflet made any reference at all to euthanasia. On the contrary, the reading of the duplicated and secretly circulated text of Bishop von Galen's sermon by the Scholl family was a key inspiration for the later idea of duplicating and distributing leaflets, and the text of the first "White Rose" leaflet properly identified as such makes no reference to euthanasia.
Similarly, it is not clear exactly what the prompted the choice of the "White Rose" as their symbol. One suggestion is that it was taken from the title of a novel published in Spanish, and another is its reflection of innocence in the face of evil.
If anyone can shed further light on this question, I will be happy to post any comments received.