Madeline L'engle-right wing propoganda?

Hi, I'm currently rereading Madeline L'engle's "The wind in the
door", the sequel to the award winning "A wrinkle in time". I enjoy
both books very much... recently a friend told me that these books
were written(in her opinion) with the intention of being right wing
propoganda... I don't understand this at all... I can see that these
are christian themed books, and L'engle has stated as much, but they
also seem to have an explicit message of the power of love, and anti
conformity... I can understand how an anti conformity message can be
right wing, such as Ayn Rand's mean spirited "The Fountainhead", but
to me, L'engle doesn't strike that kind of tone at all...

               -"Jordy"