Isis, is it just another US buzzword?

The single most important factor in ISIS' recent resurgence is the conflict between Iraqi Shias and Iraqi Sunnis. ISIS fighters themselves are Sunnis, and the tension between the two groups is a powerful recruiting tool for ISIS.

http://www.vox.com/cards/things-about-isis-you-need-to-know/sunni-shia-conflict-ISIS

Does this mean that Isis is just another name for the militant Sunnis, a new buzzword like al qaeda to revive the fading interest of the US public, to sell more newspapers, to attracts more sponsors?

When we remember we are all mad, the mysteries disappear and life stands explained. Mark Twain

“What we think, or what we know, or what we believe is, in the end, of little consequence. The only consequence is WHAT WE DO.” John Ruskin (1819 - 1900)