You might be surprised to find I'm not even a member of the NRA at this time. I am member of GOA and multiple other conservation organizations though.
By membership in the GOA, I would assume that you support many of the NRA's goals and not those of the anti-gun groups targeted. Hence, probable sympathy for the NRA and its 'presumed' tactic.
Also, keep in mind that nothing is "proven" according to the above article. The woman is linked to multiple groups in the article and also works for a firm that is used by the NRA. Maybe they used her, and maybe not.
Then maybe the NRA ought to man up and say something, rather than clam up an say nothing. That in itself says something.