Is it permissible to work in a sweets factory that produces special items for the holidays of infidels, and is it obligatory to request a change of department?

Working in the factory is permissible as long as the sweets produced do not contain anything unlawful. However, one should not work in making sweets specifically for the holidays of disbelievers, to avoid the scholarly disagreement regarding their ruling. It is preferable to transfer to another department that does not assist in the holidays of disbelievers.