Presumably referring to the number of Christians in Gaza decreasing in recent years.
Today, only about 800 ish remain, a sharp drop from the 3,000 recorded in 2007, when Hamas took full control of the enclave.
Many Different reasons for the fall but the last direct violence against Christians was in 2007, when the very last Christian book store in the entire Gaza strip was fire bombed, and destroyed. A elderly couple that owned the store, were captured and executed.
Direct violence has mostly ceased. Christian women have mostly decided to ware head coverings, which allows them to be overlooked as Christians. Equally most men have decided to grow beards again to help blend in when out and about.
Church leaders there, have formed friendships with Imams in the area and this helps to mitigatetany threats.
Also the church do as other Christians around the world do in practice, that during the prior conflicts between Hamas and Israel, the church was opened to all as a shelter for refugees and the injured.
The Christians also helped bury the dead. This has helped to gaining some sympathy from the population.
However saying all that there are still some issues and shunned in public affairs (celebrations and community events), Work place discrimination etc. Apparently they are often treated worse, paid less. So it is in fact possible that like Jews in the middle east and the UK the
Christians in Gaza could be concealingly their religion. So maybe there are still more Christians there than figures suggest, who knows.