Let them go...
And no. I don’t mean cut them out of your life. Let them take their own journey.
I am the opposite of your situation. My parents are complete brainwashed commie socialists. All government is government controled by government. My father, especially, hated my life choices of starting my own business. He worked his entire life as a gov’t stooge. Me... I’ve worked private and have had my own business 10 years now. He hates what I am.
Let your kid[s] go. There is NOTHING you can say to oppose the modern day brainwashing. NOTHING. You can only direct information. But think of it this way. My lib prog parents disowned my because they were steeped in the commie propaganda. Maybe... They will adopt conservative principles like I have for the past 20 years Find Christ, find peace, and just relax.... My parents’ hate what that i’m not a rabid hillary pajamaboy. BUT, you get over it.
That is incredible. How can they resent you owning a business? Is it that in itself or do they not like the particular type of business? Like do you own a gun shop or a Christian bookstore or something along those lines? If the nature of the business is ideologically neutral and they are objecting simply to free enterprise and making a profit, then wow they really are some serious commies.