And the evidence that cyanobacteria are the only way to fix nitrogen into DNA is...?
From the Wiki page you linked:
Nitrogen fixation occurs naturally in the air by means of lightning.
So, your own source refutes your claim. Will you have the integrity to admit you were wrong? Well, honesty is a sin in your religion, so I'm not holding my breath...
To secure ourselves against defeat lies in our own hands, but the
opportunity of defeating the enemy is provided by the enemy himself.
- Sun Tzu Art of War