This is a discussion about the general subject of 'spiritualism' rather than one relating to the specific religion and philosophy of (Modern) Spiritualism. Hence this forum is correctly sited under the 'Religion & Faiths' umbrella.
The word 'Spiritualism' is written deliberately using an upper case 'S' to signify that it's a proper noun relating to the movement/philosophy/religion.
It's a regular misunderstanding. blessings