https://taxfoundation.org/case-not-eliminating-corporate-inc..., for example, argues that relying on taxing shareholders instead of the corporation ignores foreign shareholders whose income isn't subject to US taxation. (For similar disclosure, they're generally considered right-leaning.)
And that is a good point to discuss/argue, regardless of the messenger. You could do the same with the previous resource as well; pull out points that you like/dislike and we discuss around that as opposed to shooting down any discussion because you don't like the messenger.
They aren't? What about withholding tax?
https://www.investopedia.com/ask/answers/06/nonusresidenttax...
> Nonresident aliens are subject to no U.S. capital gains tax, but capital gains taxes will likely be paid in your country of origin.
> Nonresident aliens are subject to a dividend tax rate of 30% on dividends paid out by U.S. companies.
Labor unions? Bad! Climate change? Probably good, actually!
Their article on oxygen would be "oxygen is good, always" or "oxygen is bad, always". They don't leave much room for nuance in their encyclopedia, and unsourced assertions of a policies popularity in their writings can probably be treated with a grain of salt.
The best way to demonstrate that would be to link to a more neutral source, or sources across the partisan spectrum.
"Here's an op-ed by a conservative think tank about why taxes are bad" is gonna get people expressing very reasonable skepticism.