The violent death of anyone is an evil thing and should not be sought out or glorified.  However, the lives of these martyrs should be glorified, they refused to abandon what they believed in at the hands of murderous people.   Violent extremism of any sort should be fought no matter if in Egypt, Syria, Iraq or the USA, no matter if they are committing these horrible crimes in the name of Islam, Christianity, Hinduism, Buddhism or any other religion or philosophy.