Complex sentence: On the Montenegrin independence referendum, 2006, Bećković haven't voted since he lives in Serbia, but he, as most prominent figure in the block against Montenegrin independence, had keep warmongering speechs claimed that independence will be unavoidable trigger to war.
Split into simpler sentences: On the Montenegrin independence referendum, 2006, Bećković did not vote since he lives in Serbia. However, he, as the most prominent figure in the block against Montenegrin independence, gave passionate speaches claiming that Montenegrin independence will unavoidable trigger to war.