To say that we all believe in love is simply not correct.
At a particular theological level, that statement reflects our differences in our understanding of the nature of the Supreme Being: for Christians, it’s Trinitarian, for Muslims, it’s not.
And that matters because ‘love’ is a transitive verb - it requires an object. Christians can truthfully say that God is Love, because through all eternity, love united the Three Persons of the Trinity. But not so for the allah of Islam - through eternity allah is a figure of a solitary will - in that misunderstanding, their god had nothing to love, and even after the creation of mankind, he expressed that will in a demand for submission, not love.
The true God has two important characteristics: will and reason. Allah is built on the ancient Roman and Greek pagan creations that had only wills, with no reason. This leads to a flawed understanding of a divinity set up as a whimsical tyrant who cannot be understood even in simple terms because there's no rationale to his existence -- and therefore, by extension, there's no rationale to ours.
That's why the practice of Islam is polluted with all of these references to "Allah's will" -- and really nothing else. Islam does not see the physical world as a manifestation of a rational God, so there is no attempt in Islam to really understand it. The inevitable result is that Islam may have made sense to nomadic tribes in the Middle East, but it is fatally flawed when it tries to exist in a culture built on reason and a natural order.