Why did ITF and WTF split?

In the late 1970s, early 1980s, some changes were made to the pattern set and some fundamental technical approaches which precipitated philosophical conflicts and resulted in the departure of a number of Grand Masters from the ITF. Among them was Grand Master Park Jung Tae who went on to set up his own Taekwon-Do system, the Global Taekwon-Do Federation (GTF). In 2001 General Choi's son, Master Choi Jung Hwa, was voted the successor to the ITF presidency, but the succession was subsequently overturned by General Choi. Believing himself to be the duly elected president, Master Choi Jung Hwa moves to Canada and sets up headquarters there. This ITF becomes known as ITF-C (for Canada). In his last Will & Testament, which he dictated in front of a number of his Grand Masters, he named Mr. Chang Ung the president of the ITF. Mr. Chang Ung was basketball player with no Taekwon-Do experience. General Choi was hoping to use Mr. Chang Ung's position on the International Olympic Committee to have ITF Taekwon-Do added to the olympics, replacing WTF style Taekwondo. This caused huge controversy and on June 15, 2002 when General Choi Hong Hi passed away, the issue of the ITF presidency had not been resolved. In the confusion the Vice President of the Vienna based ITF (now known as ITF-V) had declared himself the Interim President of the ITF-V. Meanwhile, General Choi's son, Master Choi Jung Hwa, continued his assertion as president of ITF-C (the suffix initials of V and C were added as a way of distinguishing which ITF system was being referred to). In addition to ITF-C and ITF-V, Mr. Chang Ung became president of what became known as ITF-NK (for North Korea) splitting the ITF into three separate organizations.