I commented on the claim there were illegal kidnappings, which is the part there is no evidence of. What is true, according to the link, is that LE used unmarked vehicles.
And (truth value unknown by Snopes because proving a negative is impossible, but it corresponds with the videos) failed to wear identification or do or say anything that would allow the person being taken by unknown people into an unmarked car to distinguish those people from one of the paramilitary alt-right militias that populates Oregon.