21. Arab leaders say an attack on Iraq would be insupportable  amid Palestinian-Israeli violence. 22. "It's insupportable  to have landed gentry running the country ." 23. He called the idea " insupportable  on both public policy and legal grounds ." 24. Small wonder it was groaning along as if under the burden of a nearly insupportable  weight. 25. The posturing by Miami's elected leaders in refusing to aid federal authorities was insupportable . 26. Since that's an insupportable  concept, Wikipedia would have no good reason to exist. 27. Most studies also made insupportable  assumptions about the effectiveness of care and the medical costs of prematurity. 28. "All of this is unsubstantiated and insupportable , " government spokesman Dimitris Reppas said. 29. But it's insupportable  that a particular ethnicity should " own " a set of articles. 30. "Every conclusion he reaches is insupportable  based on the physical evidence, " she said.