I agree with ralphinal.

There is enough in the Qur’an for a Christian to ‘have issues with’ without having to make things up.
I mean that in the sense that the Qur’an does call some of the things that Christians do, it calls them blasphemy against God.
For example: O People of the Book! Commit no excesses in your religion: Nor say of Allah aught but the truth. Christ Jesus the son of Mary was (no more than) a messenger of Allah, and His Word, which He bestowed on Mary, and a spirit proceeding from Him: so believe in Allah and His messengers. **Say not “Trinity” : desist: it will be better for you: **for Allah is one Allah: Glory be to Him: (far exalted is He) above having a son. To Him belong all things in the heavens and on earth. And enough is Allah as a Disposer of affairs. 4:171
But nothing about excrement there.
They do blaspheme who say: “Allah is Christ the son of Mary.” But said Christ: “O Children of Israel! worship Allah, my Lord and your Lord.” Whoever joins other gods with Allah,- Allah will forbid him the garden, and the Fire will be his abode. There will for the wrong-doers be no one to help. They do blaspheme who say: Allah is one of three in a Trinity: for there is no god except One Allah. If they desist not from their word (of blasphemy), verily a grievous penalty will befall the blasphemers among them. Why turn they not to Allah, and seek His forgiveness? For Allah is Oft-forgiving, Most Merciful. Christ the son of Mary was no more than a messenger; many were the messengers that passed away before him. His mother was a woman of truth. They had both to eat their (daily) food. See how Allah doth make His signs clear to them; yet see in what ways they are deluded away from the truth! 5:72-75
Yet again, nothing about excrement.