Trying to make that sort of distinction is pointless IMHO as culture and religion has been so intertwined for so long to try and parse the two is just playing ‘No True Muslim’.
Religions are what religions do and Islam and violence currently go together like crusading and witch-burning was part and parcel of Christianity at one time. If it’s done by the religious in the name of their religion, then apart from quibbling about numerical thresholds, then that is an aspect of a religion.
Therefore honor killings and all the other lunatic crap about women is part of Islam today and can’t be hand-waved away a la Tomndebb stylee. A for crying out loud - you only have to read the Koran to see it is a violent religion at heart.
And before the same old tired apologetics are dragged out about the Bible - the Bible and the Koran are not the same thing. Only lunatics believe the Bible is the direct word of God and should be obeyed in all things. In Islam the Koran is the dictated Word of God to be interpreted in the light of his perfect messenger’s life.
Both offer ample and firm foot-holds for violent interpretations. For me it is those who argue against this position who are straining at gnats and practically breaking their spines to see a glimmer of some sort of liberal islam.
It hasn’t happened in all the intervening centuries and instead Islam has solidified into two huge and antagonistic blocs, albeit with a fringe of powerless and inconsequential sects who have no hope whatsoever of influencing anything.
The West should not give one hair-width of ground ever to external Muslim ‘outrage’ or internal Muslim demands for compromise over social mores, political policies or legal structures.