I didn't make this an NRA discussion. I merely addressed your concerns about what anyone can do about too much NRA fund raising. I cannot see how LACA affiliation with NRA would jeopardize non-profit status if it didn't make it a for profit entity. It would (or should) be different for a church since their non-profit status is based upon the 1st Amendment Freedom of Religion, and many take in large amounts of money. But many also venture into politics without any threat or loss of non-profit status even when they are rather blatant about political preferences and endorsements.
I'd rather not get into politics either, but unfortunately, it is politicians of a particular bent who are a constant threat to our right to own and shoot firearms. If none of us got into politics pertaining to our gun rights, they would be as good as gone.
It seems as if you answered your own question about the need or necessity of some type of liability insurance. If you don't think there is ever even a remote possibility of an injury or accident due to a LACA Display, then spending money on insurance is not necessary. Nobody can sue LACA for libel if you say that Lefever engraving or choke boring is better than Parker or L.C. Smith.
But if a certain venue will not permit you to display your guns without liability insurance, then you either buy insurance, display pictures of your guns instead of the real thing, or just stay home... and hopefully think about the Liberal Democrat politicians and anti-gunners who encourage lawsuits to bankrupt gun owners, gun manufacturers, and discourage firearms ownership by making it too costly.