Please provide links to any scientific studies supporting your assertion for anything other than lower back pain. Since when did X-rays measure pain?
For a balanced, scientific, discussion of the facts start here:
http://www.nhs.uk/conditions/chiropr...roduction.aspx
http://www.nhs.uk/Conditions/chiropr.../Evidence.aspx
http://www.nhs.uk/Conditions/chiropr...egulation.aspx