That’s not how I see it at all. He has constantly played on his persecution complex - his whole schtick since 2020 has been conspiracy based on a ‘stolen election’ and how they’re all out to get him - and it’s very popular. He’s the leading republican nominee. His supporters will see him being jailed as confirmation of everything he’s already saying ‘they all hate Trump’, ‘they’re trying to stop Trump being president’.
He understands exactly what motivates his supporters and him being perfectly happy to go to jail for contempt should tell you everything you need to know.