It doesn't of course. John 3:16 simply says that you have to believe Christ in order to be saved by Christ. So you have, among other things, do what He says, and that includes the good works that He teaches. Surely John 3:16 does not say "Beleive in Christ, except what He teaches in Matthew 5-7".
I KNOW Catholics do not believe in everything Christ said, because I once was one and rarely did we even read for ourselves what God's word said
That the Catholics (surely many Catholics) rarely and poorely study the scripture and instead rely on their priest to explain it to them does not mean they do not believe everything Christ said. They simply get it through the mediation of the Church who, as we know, produced the written record of what Christ said to begin with. You, on the other hand, get it through the spin of Protestant charlatans. So who is ahead fulfilling the commandment of John 3:16??
Dear annalex, any works that one does with the motivation of acheiving salvation are as filthy rags, and cannot benefit your state.
Only the works of one that is saved can be good.
So, you proved my point. Thank you. The point was that you claim "Protestants" must put their spin on verses of scripture, and I showed you that you do exactly that. You HAVE to, because, to you verses in context cannot mean what they say, they have to be spun to adhere to the Catholic Church's dogmas.