Please use Revelation of God in a erroneous sense.
If one tries to think like a modernist, like a liar and a hater of Christ, then one might be able to grasp the cunning and sickness of V2. I don't recommend it, but it's the only 'theme' that repeats itself throughout the V2 docuмents.
If you keep in mind that 'religious liberty' means that conscience is the moral guide, even for people of different faiths, then you would see that 'revelation of god' could mean that a muslim's consciences could be correct, because they are enlightened by a "revelation of (his) god". This is not a direct teaching, but is implied passively, as usual.
'Divine Revelation' refers to a specific idea in catholic theology and also implies ONE Divinity (i.e. the one, true God). V2 did not use this because modernists believe in a freemasonic-dual divinity and want all religions to be equal.