The Bible speaks of 'if you break one law you have broken them all' to show the futility of trying to be good enough for Heaven according to law keeping, but although theologically it seems correct to many to say God sees all sin as equal, it is not reflected in scripture, as Paul plainly states, when writing to Christians:
The acts of the sinful nature are obvious, sexual immorality, impurity and debauchery, idolatry, and witchcraft, hatred, discord, jealousy, fits of rage, selfish ambition, dissensions, factions, and envy; drunkeness, orgies and the like. I warn you as I did before that those who live like this will not inherit the kingdom of Heaven
Gal5:19-21
Paul was warning believers that such behaviour would not allow them to inherit eternal life, and yet Paul did not believe a person had to be 'perfect' in the flesh to be a Christian
Spurgeon also in his well known book on grace explained that we all have sins to mourn over, but gave a list of four of five sins(can't remember which ones) that if not dealt with in the Christian life would mean a person could not inherit eternal life.
I have never met any Christian in any church who profesess to be perfect according to the flesh, so they know they sin, but at the same time I have never known any Christian who on that basis would accept as saved a person who committed mutliple murders once saved and wanted to be a member of their church. So in reality I have met no Christian who would consider all sin as equal, and I would say that is Biblical.