I’d rather the profits on the chicken not go to Saudis. Chicken as a raw material may be fungible, but as sold in a fast-food restaurant it is a product, it is not particularly fungible, and choices consumers make do matter.
May we assume you no longer buy gasoline?
The profits of imported oil are much more directly involved with Islamic governments supporting sharia than chicken sold by a private investment company.
Most people buy lots of products from China which is still a Communist state and in some cases uses prison labor (which amounts to slave labor) for manufacturing processes of products.
If we are going to applaud the owners of Chick Fil A for practices which are guided by deeply held religious beliefs, then rationally we should allow other private companies to do the same.
However, spending our own money for a product is a private decision. I don’t buy Citgo gas because it is wholly owned by the Venezuelan government and I can identify it as directly supporting a government which I despise.