All groups that are not under the hearing of the word of God are considered fools .No God in their hearts . Its either faith or no faith. No limbo as doubt in between .Either a persons believes God or they do not.
That would be how the Bible describes fools. no faith, not little. . . . . . none.
Deuteronomy 32:20King James Version
And he said, I will hide my face from them, I will see what their end shall be: for they are a very froward generation, children in whom is no faith.
Its the atheists or philosophers that want some credit for creating something that is not of God .They have no part with God.. No hope coming from their corrupted flesh. Dead without hope, atheists, no god in their hearts.
No division between a Jew or a Gentile .Considering all as fools so that he could have mercy on them
Romans 11:32King James Version
For God hath concluded them all in unbelief, (no faith) that he might have mercy upon all.