Answer:
they are people of different faiths
Explanation:
The Armenians and the Azeris are both groups of people that live in the Caucasus region. For a very long time, and it continues in modern times, these two groups of people have had bad blood between them.
The basic reason for this has been the religion. The Armenians are Christians, while the Azeris are Muslims. Since the Turkic expansion in the 15th century, and the conquering of the Armenian territory, there has always been problems between the two groups.
The Turkic people were trying to force the Islam on the Armenians, while the Armenians wanted to keep their faith at any cost, so they had lot of conflicts over the past few centuries.
Another reason fro the ill will between the Armenians and the Azeris has been the region of Nagorno Qarabag, which actually even led to a war between the two.
