These brothers from America preach until an Israeli officer with a fully automatic weapon takes them away. I’ve had the privilege to preach with one of them here in the USA.
I cringe at the thought of the MILLIONS and MILLIONS of dollars that churches within America raise each year, so that their sheep can go to Israel for nothing more than a learning experience, a paid vacation, and/or a gloried field trip. To do so without primarily sharing the Gospel, is self-serving and gratuitous. But the Bible does command Christians to go out and preach His glorious Gospel, and to even be willing to lay down their life for the cause of Christ.