at least they should not be .. Moses disobeyed God when God told him to speak to the rock and he struck it instead out of anger ..
we can sin even when we "love God with ALL our hearts minds, body and soul" .. but it should NEVER be purposely .. that is putting your will over God's ..
what God does understand, is when you do it out of ignorance, bad judgement or a weak conscience .. Paul elucidates the later for us in
1Cr 8:12 ..
those three are stumbling .. whereas they were NOT done as a purposeful act to place your will above God ..
May God bless you and guide you in His ways ..