Your blunt assessment is hardly different from the prevailing opinon of some of the Pharisees...
Matthew 12:22-32 refers....
Blunt? Yes, but very different.
The Pharisees judged by man's law.
As the article shows, the doctrine of the trinity isn't from the same God that fathered Jesus Christ.
The baalim fooled Isreal just as the trinity fools 'Christians'.
The very name "trinity" is anathema to monotheism.
There is one God and God is one, not three.
Believe what you want, I've learned to expect no more than that from people, they only believe what they want to believe.