These were the Templers, not to be confused with the Knights Templar. They built the old housing in the Kirya, the German Colonies of Jerusalem and Haifa, and Galilean Bethlehem. The British expelled nearly all of them due to pro-Nazi sentiments and espionage in their ranks.
The history of the "Masorati" movement in America is one of total destruction. They call themselves "masorati" when they are really just the "conservative" movement & they are hemorrhaging themselves to death through massive assimilation. It's quite unfortunate that they are bringing their failed ideologies to Israel, but I don't expect them to succeed because Torah-true Judaism has saturated this country so people see what's real & what's not.