With all respect, your opinion is quite false. Druze began as offshoot of Ismaili Shiite Muslims, and of the Ismailis living in modern-day Lebanon there were the ones who accepted the Druze da'wah with the influx of families and missionaries from northern Syria, and there were ones who remained Ismailis and changed to Twelver Shia Islam and a very small minority that remained in Jabal Mohsen. There might have been Christians who accepted the da'wah for sure, but for the people who accepted the Druze da'wah it required you to be familiar with Ismaili Shiism and the Platonic influence that is still present till this day in Ismaili theology. Which is odd that you say it's closer to Christianity, even if a certain sect is an off-shoot. Samaritans are an off-shoot of Judaism you could say, yet they're closer to Judaism than Christianity or Islam.From our personal experiences with them and what is already known.
I don't agree with stance that they are an off-shoot of Shiism. The founders may have been Shia Ismails, but it's a completely different religion. It's known they started as unitarians trying to unite Sunnis, Shia's and Christians and it failed to spread in Egypt but it quickly spread throughout Mount Lebanon. I also suspect the original converts in Mount Lebanon may have been Christians. There's even several genetic studies that say Druzes are genetically very close to Christians since they lack Arabian input, unlike most Muslims. So there's that also.