stopbeck slanders founding fathers in effort to slander Glenn Beck

Stopbeck.com  claims that just because Glenn Beck defends the founding fathers for crafting the 3/5th compromise that this is tantamount to endorsing slavery.   This is bunk and yet another attempt by a liberal to diminish the founding fathers in the eyes of the public.   George Washington, John Adams, Thomas Jefferson, Benjamin Franklin, James Madison, and Alexander Hamilton   all worked in one way or another to end slavery in their lifetimes.  As Barack Obama would say "I am doing the best I can with the situation I inherited"   
Here is an article about the founding fathers efforts to end the institution of slavery.
http://www.heritage.org/research/americanfoundingandhistory/wp01.cfm

You can either believe stopbeck.com or you can believe Fredrick Douglas who said:

It was purposely so framed as to give no claim, no sanction to the claim, of property in man. If in its origin slavery had any relation to the government, it was only as the scaffolding to the magnificent structure, to be removed as soon as the building was completed.

He also said

"Take the Constitution according to its plain reading, I defy the presentation of a single pro-slavery clause in it.Interpreted as it ought to be interpreted, the Constitution is a glorious liberty document."

And now Fredrick Douglas gives stopbeck.com a roundhouse punch with this final statement.

“Let me tell you something. Do you know that you have been deceived and cheated? You have been told that this government was intended from the beginning for white men, and for white men exclusively; that the men who formed the Union and framed the Constitution designed the permanent exclusion of the colored people from the benefits of those institutions. Davis, Taney and Yancey, traitors at the south, have propagated this statement, while their copperhead echoes at the north have repeated the same. There never was a bolder or more wicked perversion of the truth of history. So far from this purpose was the mind and heart of your fathers, that they desired and expected the abolition of slavery. They framed the Constitution plainly with a view to the speedy downfall of slavery. They carefully excluded from the Constitution any and every word which could lead to the belief that they meant it for persons of only one complexion.

The Constitution, in its language and in its spirit, welcomes the black man to all the rights which it was intended to guarantee to any class of the American people. Its preamble tells us for whom and for what it was made.”

@stopbeck yesterday on twitter criticized Glenn Beck for questioning the honesty of a black man.   Will he question Fredrick Douglas's honesty?