Have you formed this opinion from reading the actual judgements of the cases that you're characterizing as "targeting" ? I admittedly have not, but I did read the details of the cases said former president was filing about the election being "stolen", and ended up concluding that those filings were utterly baseless. With the way tax and business filings work in the US, there is wide leeway for making up your own numbers, with the threat of possible eventual scrutiny being the only incentive pushing people towards honesty. Given the blatant con he was trying to perpetrate with legal filings for the subject that I did dive deep into the details of, it's reasonable to prima facie accept the courts' conclusions that he was also running scams with tax and business records. Furthermore, in the US nobody is supposed to be above the law - even a sitting president must be bound by the law in order for the whole idea of seperation of powers and constitutional constraints to have merit. So it would actually be an undermining of the rule of law for such investigations and prosecutions to not proceed.