Is income considered unlawful if a website displeasing to Allah is created by a visitor who was converted to a web hosting company through advertisements, and is it permissible to deal with a company whose owner is Jewish?

The questioner is not forbidden from the commission he obtains, due to the possibility that the visitor might use the site for an unlawful purpose, unless he is certain or reasonably believes that a specific visitor intends to create a site for an unlawful purpose. In that case, it is not permissible to direct him to a site that offers hosting services.

As for dealing with a company owned by a Jew, there is no harm in it, as long as its activities are permissible.