why is the 6th right "no religious test for witnesses or jurors" included in the Oregon constitution but not the US constitution?

Oregon constitution has some rights in that the 6th right is "no religious test for witness or jurors".

Explanation:

The 6th right "no religious test for witness or jurors" states that none of the person shall be rendered incompetence as a witness or jurors in consequence of his opinion in matters of religion, nor be questioned in any court of justice in touching his religious belief to affect the weight of his testimony.

The Oregon constitution was formed by the convention of delegates selected by the people. The constitution was approved by the vote of people of Oregon territory. The source of the amendment, revision or addition is revised for the following sections.

In 46 sections various bills of rights are passed in the Oregon constitution as a preamble.