Amazon accused the union of illegal intimidation of voters, why would you immediately trust one side in the matter?

Unions and corruption/illegal conduct, after all, go hand-in-hand. Consider the fact the RWDSU was caught illegally intimidating workers into signing up to them in order to extract fees, earning them a rebuke from the NLRB. [1]

So, if the retail unions targeting Amazon have such a history of illegal intimidation, and Amazon is alleging it's happening yet again, why shouldn't they be believed?

These unions have shown they'll intimidate and operate illegally to achieve their goals.

[1] https://en.wikipedia.org/wiki/Retail,_Wholesale_and_Departme...