How does Dispensationalism understand John 10:16?

From this answer it is stated "Peter, James, John (the twelve) were followers of Christ's earthly ministry to Israel (the circumcision)." and from a comment there given for clarity, "The gospels were directly to Israel regarding the coming kingdom of heaven and 'prophecy' that was revealed to Israel's prophets "since the world began" (Luke 1:70).". The answer states that, while all of the New Testament is profitable for those in the Church it is the Apostle Paul's writings that are specifically to and for the Church with the rest (especially the Gospels) specifically to and for the nation of Israel. The twelve Apostles were Christ's ministers to Israel and Paul was Christ's minister to Gentiles. The Dispensationalist view seems to be that Jesus is building His Church now and **some Jews** believe and are added to the Church. At some point the Church will be removed from earth and then **lots of Jews** will believe but they will not be part of the Church (because the Church age is over). > And other sheep I have, which are not of this fold: them also I must bring, and they shall hear my voice; and there shall be one fold, and one shepherd. - John 10:16 (KJV) In this passage John records Jesus saying **to the Jews** that there is one sheepfold of His sheep into which "other sheep" will be brought. The natural reading of this seems to be that Jesus' sheep are the believing Jews and the "other sheep" who are not of this fold that will be brought in are the Gentiles. This appears on the surface to be the exact opposite of dispensational thought wherein Jews believe in Jesus and are added to the Church and where there are two "sheepfolds", Israel and the Church. Parenthetic: A similar difficulty arises in Romans 11:11-24 where the wild olive branches (Gentiles) are grafted into the good olive tree (Israel) so that there will be just one olive tree. My question for Dispensationalists regarding John 10:16 is: How is the plain reading of this passage overcome?