"English is a second language to me, and I had absolutely no difficulty reading that, or any part of the document. Jefferson clearly states his idea that religion can corrupt politics, as well as BE corrupted by politics."
Thank you for your opinion about Jefferson's writings.
It isn't my opinion of what he said, it's what he said.
"...proscribing any citizen as unworthy the public confidence by laying upon him an incapacity of being called to offices of trust and emolument, unless he profess or renounce this or that religious opinion, is depriving him injuriously of those privileges and advantages to which, in common with his fellow citizens, he has a natural right; that it tends also to corrupt the principles of that very religion it is meant to encourage..."
Not electing people based on their religious opinions is both against an individual's natural right, and corrupts the principles of the religion it's meant to encourage.
How so?
"... by bribing, with a monopoly of worldly honours and emoluments, those who will externally profess and conform to it..."
By electing to offices of power people who EXTERNALLY profess to those religious beliefs, meaning that SAYING that one is a Christian does not make one a Christian.
So, like religion, politics would be corrupted by people externally professing adherence to this or that religious opinion in order to gain and maintain themselves in political offices.