Why did the Kalmyks and Karachay Ethnic groups not get along?
http://www.google.com/search?hl=en&rlz=1C1CHMI_enUS307US320&q=Kalmyks+&aq=f&oq=&aqi=g1
and
http://www.google.com/search?hl=en&rlz=1C1CHMI_enUS307US320&q=Karachay&aq=f&oq=&aqi=g3g-s1g6
Read widely about both groups and make two lists -- one for each group, listing items about their cultures. Once you have the lists side by side, you should be able to come to some conclusions.
Let us know what you decide.