My point is that it doesn't matter
Then you would fall under the 'living Constitution' group of supporters.
The only relevant question is what is actually the right thing for the government to do.
We decide this by deciding if current laws or practices conflict with the Constitution. (its a catch-22)
It should be based on some principle of human rights and should be argued as a human rights issue.
Using this principle all people who support racism etc should not have any right to do so as their views support the opression of basic human rights. However, the Constitution forbids this: All Citizens have basic rights that cannot be taken away. While I hate Neo-Nazi's, Muslim Extremists etc..etc.. they still have rights.
This need not coincide with what Jefferson, Franklin et al. thought was right or even what they would think was right if they were alive and faced with these new situations.
But it does! It is the basic legal consideration of intent. Its like making a decision on business contract- you need to know (or guess) the intent of both sides in order to make a sound decision.
We do make changes from time to time (slavery, prohibition, womans right to vote, legal age of voting, etc..etc..) but is a VERY big deal to change the Constitution and is not easy to do.
Similarly, it matters not a jot what the founding fathers thought about religion and government.
Then our Government and our Rights would be Changing year after year after year. While the Constitution is in no ways perfect (what form of Government is) is does provide for a framework of Stability that allows Change at a VERY slow pace.