No, it's because your education is western-centric and Islamic invasions took over the east. Eastern Christians have been subjected to genocide at the hands of Muslims for 1300 years.
Edit - really, someone is asking for a citation that the Islamic conquests happened? Next should ask for a citation that the sky is blue...
This is basic world history, like the discovery of the new world, Alexander the Great's conquests or the Roman empire...
Edit - really, someone is asking for a citation that the Islamic conquests happened? Next should ask for a citation that the sky is blue...
This is basic world history, like the discovery of the new world, Alexander the Great's conquests or the Roman empire...
https://en.wikipedia.org/wiki/Early_Muslim_conquests
And yes, it happened over 1300 years ago, the first decisive battle was the Battle of Yarmuk, year 636 CE.