From the difference between shirk (associating partners with Allah) and kufr (disbelief), and is every mushrik (one who associates partners with Allah) a kafir (disbeliever)?

Question:
May Allah reward you, Honorable Shaykh. This questioner says: What is the difference between shirk (associating partners with Allah) and kufr (disbelief)? And is every mushrik (one who associates partners with Allah) a kafir (disbeliever)?

Answer:
Kufr (disbelief) occurs through denial; denying the Lord, Glorified is He, or denying the Creator is kufr (disbelief). Among this are the materialists who do not acknowledge the Creator, the Dahrists; these are disbelievers, disbelievers, and they are not called mushrikin (those who associate partners with Allah) because they do not acknowledge the Creator. As for the mushrik (one who associates partners with Allah), he acknowledges the Creator and affirms the oneness of Allah in lordship, but he associates partners with Him in worship. This is the mushrik (one who associates partners with Allah). This is the mushrik (one who associates partners with Allah). Every mushrik (one who associates partners with Allah) is a kafir (disbeliever). But not every kafir (disbeliever) is a mushrik (one who associates partners with Allah). One may be a Dahrism, a materialist, or a naturalist who does not acknowledge the existence of the Creator. Yes.