Original sentence: Global membership is more difficult to quantify; Messianic groups claim considerable growth in the past five to ten years in Russia, Ukraine, and even in Mexico, but accurate statistics are difficult to come by.Jews for Jesus is one such group.Many Messianics do not use the "Christian" label.Perhaps the best known of the Messianic groups, although certainly not the largest, is the controversial Jews for Jesus.They also sometimes are referred to as Jewish Christians, Hebrew Christians, or Christian Jews
Edited sentence: Global membership is more difficult to quantify; Messianic groups claim considerable growth in the past five to ten years in Russia, Ukraine, and even in Mexico and Argentina, but accurate statistics are difficult to come by.Jews for Jesus is considered to be one such group.Messianics, for the most part, do not use the "Christian" label.Perhaps the best known of the Messianic groups, although certainly not the largest, is the controversial Jews for Jesus, which is not considered to be Messianic Jewish by other Messianic Jews.They also sometimes are referred to (mistakenly) as Jewish Christians, Hebrew Christians, or Christian Jews