It’s not clear to me that you can take away someone’s second amendment rights even with due process, just as you couldn’t take away someone's first amendment rights with due process. (You couldn’t, for example, create a “red flag” law that imposed prior restraints on the political speech of specific people, even if it required a signed order from a judge.)
Due process is the baseline required to deprive someone of “life, liberty, or property.” If you could take guns away with merely due process, then you wouldn’t need the second amendment, because guns are also property. That right merited it’s own amendment, with additional protections.