Shituf For Goyim - Chazon Ish

 Chazon Ish (Likutim Sanhedrin 63b) Question: Is shituf permitted for a ben Noach? Answer: While Tosfos and the Ran do not prohibit it for a Goy the Rambam does not distinguish between a Jew and a Goy in ths matter and considers it Avoda Zara. The Chazon |Ish rules in agreement with Rambam

Rambam (Melachim (09:02) A Noachide who worships false gods is liable provided he worships them in an accepted manner.A Noachide is executed for every type of foreign worship which a Jewish court would consider worthy of capital punishment. However, a Noachide is not executed for a type of foreign worship which a Jewish court would not deem worthy of capital punishment. Nevertheless, even though a Noachide will not be executed for these forms of worship, he is forbidden to engage in all of them.We should not allow them to erect a monument, or to plant an Asherah, or to make images and the like even though they are only for the sake of beauty.

Rambam (Melachim 11:4) Jesus of Nazareth who aspired to be the Mashiach and was executed by the court was also alluded to in Daniel's prophecies: 'The vulgar among your people shall exalt themselves in an attempt to fulfill the vision, but they shall stumble. 'Can there be a greater stumbling block than Christianity? All the prophets spoke of Mashiach as the redeemer of Israel and their savior who would gather their dispersed and strengthen their observance of the mitzvot. In contrast, Christianity caused the Jews to be slain by the sword, their remnants to be scattered and humbled, the Torah to be altered, and the majority of the world to err and serve a god other than the Lord.

Rambam (Melachim 11:7)  Nevertheless, the intent of the Creator of the world is not within the power of man to comprehend, for His ways are not our ways, nor are His thoughts, our thoughts. Ultimately, all the deeds of Jesus of Nazareth and that Ishmaelite who arose after him will only serve to prepare the way for Mashiach's coming and the improvement of the entire world, motivating the nations to serve God together as Tzephaniah 3:9 states: 'I will transform the peoples to a purer language that they all will call upon the name of God and serve Him with one purpose.'

Rambam (Melachim 11:8)  How will this come about? The entire world has already become filled with the mention of Mashiach, Torah, and mitzvot. These matters have been spread to the furthermost islands to many stubborn-hearted nations. They discuss these matters and the mitzvot of the Torah, saying: 'These mitzvot were true, but were already negated in the present age and are not applicable for all time.'