This really isn't the place for an in-depth discussion of why Virginia seceded from the United States, but there were a number of factors noted by historians, all of which are tied back to slavery. It is certainly not fair to say that Virginia seceded due to "Lincolns planned invasion of the South". A number of historians, including Edward Ayers say that the final straw was Lincoln's calling for troops to assist in recapturing Sumter and other captured forts, but it wasn't the only or main reason for secession. The real reason was that they saw Lincoln as a threat to slavery, and the mustering of troops to use against pro-slavery forces was an example of that threat.
I also don't see how the Politically Incorrect Guide to the Civil War would pass as a reliable source. Its publisher, Regnery Publishing, calls its publications "contrary to those of 'mainstream' publishers in New York". Unfortunately Wikipedia's goal is specifically the opposite; we're supposed to summarize the points of view of the mainstream publications on the subject. The author, Harold William Crocker III, doesn't seem to claim any credentials in the field.--Cúchullain t/c 16:18, 7 March 2011 (UTC)Reply