People of many faiths and ethnicities were killed by the tsunami. There is not a region of this planet that does not have to deal with natural disasters and that includes regions that are predominately Christian.
This past hurricane season was a major disaster for Florida; the current weather in California is causing mudslides in the southern part of the State as a result of the rain and wild fires from last summer. There are record-breaking snowfalls in Northern California. Los Angeles and San Francisco are built on major faults that cause earthquakes. I live in Colorado and we have been experiencing a draught for the last 5 or 6 years, which has contributed to major forest fires. These natural occurrences are not God's judgment visited upon the human race; they are simply natural occurrences.