I do think the primary votes in non-consecutive primaries seems “out there” to prohibit someone from running in a primary.
In this case, and knowing Rose Acre Farms’ products as I do, which have had a bible reference on them, I believe him. I can see voting for a friend in a primary, across your normal party line.
I would suggest he likely had decades of prior Republican party primaries he voted in.
The law seems excessive, but it may still stand, after judicial review.
No - the law is correct.
Political parties are private entities and have total control over whom they can support as a candidate (or not as the case maybe)