Christians are often accused of being pro-slavery, even though if you look at your history books, it is Christians who brought about the end of the slave-trade a few centuries ago. Christians are often accused of being racist, and yet if you look at your history books, it is Christians who have been the promoters of the most wonderful rights for those who are of different skin-colours.
Now of course, there are plenty examples of slave-owning, racist, sexist Christians, but that is because they ignored the message of Christianity, not because they followed it.
These are the accusations that Christians are often levelled with, that “Christians are intolerant, hateful kinds of people”. Which might make us ashamed of the Gospel.
What’s more, to the majority of people, it is laughable to believe in the supernatural. “It flies in the face of science” —or so they think. And yet, again, science, and even the atheists who believe in this science, it is all built on the legacy of Christians. It is Christians who promoted all of the science over the centuries, and yet they are now being disenfranchised of that legacy that they’ve created. It is assumed that Christians are anti-science, even though all the best scientists in history, all the best mathematicians in history, all the best artists in history, all the best musicians in history, all the most successful people in every field in the past few centuries have all been Christians, or at the very least have existed in a Christian-framework and have thrived in a Christian-atmosphere, which, if it didn’t exist, they would have no leg to stand on. But that is something that the world is largely unaware of.
Lots more reasons why we may be tempted to be ashamed of the Gospel.