There's a terrific Twain quote about reading the news. Paraphrasing: if you don't read the news you're uninformed, but if you read the news you're misinformed.
What gave black Americans the right to vote was not a bill, so you may be in the latter category at least regarding that claim. Kirk does seem to have been against the Civil Rights Bill. This is a position I hadn't considered but could probably steel man decently given the fact that so many govt interventions tend to have the opposite of their intended effect (Inflation Reduction Act, Patriot Act, Bank Secrecy Act, etc).
Have you listened to Kirk yourself or are you going by what someone else is saying?
(I'm still genuinely open to you being right on your other claims. I'm currently trying to piece together what Kirk stood for and his views.)