Actually there is confusion about just what the Yezidis mean when they can Lucifer “Malak Ta’aus” or “Ta’us Malak” and they will not tell you directly. Sometimes they say Malak means angel or king, and in Semitic languages both are possible depending on vocalization. It is still the worship of what Christians from Armenia to Iraq know as the fallen angel, the devil.
Even if they do, does that justify blowing up hundreds of them with truck bombs?