Just more nonsense.
4:171: Say not "Trinity": desist! It will be better for you: for God is One: Glory be to Him! (far exalted is He) above having a son.
5.073: They do blaspheme who say: Allah is one of three in a Trinity:
Protestants didn't write it. This comes from a Catholic writer working for a Catholic organization. Don't blame me if you guys don't talk to each other.
I guess what is nonsense in the Catholic Church is in the eye of the beholder. Why isn't this article nonsense and the Catholic/Muslim article is?