As for the righetous, their unity is supported by God, in fact it is a commandment in all the scriptures that the sincere shall unite in one column.
"This is a test. You shall not abuse such knowledge." But the people used it in such evil schemes as the breaking up of marriages.
Yes, Ahmad, I get your point.
My point is that the sincere unite in one column but it's a unity in SPIRIT and ATTITUDE, not in material institutions, supported by God. There can exist unity without it being visible or measurable.
As for the other quote; exactly. It says "you shall not ABUSE such knowledge."
An important detail in my opinion.