Paul was once their national hero. They would have delighted to have him for a son-in-law. For a long time Paul was known to these Jews as a devout Jew, a Pharisee, no less. More than this, he was a "Hebrew of Hebrews." He was one of the outstanding young men of Judaism. He wanted to show them how zealous he was as a Jew so they might understand the tremendous, cataclysmic effect of the transformation that took place in him.
Was Paul now guilty of forsaking Judaism? Far from it! Paul, in his remarks in verses 6-8, shows that it is on account of his Jewish hope that he is now on trial. He is not really on trial for opposing Judaism, but rather for adhering to it.
View sermon transcript here: http://www.bereanbiblechurch.org/transcripts/acts/26_1-18_video.php
7/11/2010 - Pastor David B. Curtis - Berean Bible Church -http://www.bereanbiblechurch.org - Message# 512