History of weather records made to fit politics?

1. Compare the 1994 record to the 2004 record. Identical text, different graph. Where is the medieval warm period between about AD1100 and 1300 where vines grew in Yorkshire? WHere is the ‘Little Ice Age’ between about AD1400 and 1850, during which freezing of the Thames in winter was not uncommon?
   From: "Global Warming: The Complete Briefing"
   Source: intelstrike.com...
   Has history been rewritten or has the chart truly been "corrected" to it's current "hockey stick pattern"?
2. The snow was up to my balcony all winter (1 m), this morning I can see the top 3 steps. Yay!