Wrap-up: about the multiple Gods of IslamIt seems, that Islamic deity, is actually more complex and polyform that originally believed (more than the Holy Trinity, it seems). We have different kind of Gods at work (their relationship is partly to be guessed)
Allah, who's the best of creators, suggesting that other creators exist (Q 37:125). One such creator is Allah’s Spirit who is as well as good as a creator since he creates in the same exact way (Q. 15:29; 19:16-19; 66:12). It seems that Allah’s Spirit is omnipresent and omnipotent since he can be with all believers to strengthen them (Q. 2:87, 253; 58:22). According to some Muslims, Allah’s Spirit is Gabriel, which means that Gabriel is all-powerful and present everywhere.
We have the Qur'an, that is eternal, finite and infinite, co-eternal, create and uncreated. We have to add the mother of the Qur'an (ommi alkitabi), that is as well eternal of course.
We have the problems with the worship that is due to Allah only. but we find in the Qur'an that
a) Allah commanded the angels to worship Adam and that Joseph’s father and brothers worshiped him as well (Q 2:34; 12:4, 100; 18:50)
b) The Qur’an commands Muslims to praise and worship Muhammad and also exhorts them to obey him as they obey Allah: (…may believe in A and his messenger, and may honour him, and may revere him, and may glorify him …Q 48:9-10. Check as well Q 8:24)
More importantly: Jesus is to be honoured and to be believed in, the same way as Allah (Q 9:31)
Of some minor (but not irrelevant) issue: Muhammad commanded his followers to kiss the black stone, thereby causing them to commit idolatry: "The Apostle was touching and kissing it." Bukhari 2.026.680). "Had I not seen Allah's Apostle kissing you I would not have kissed you." Bukhari 2.26.667).
Still believing in the purity of Tawhid?