The Democrats already are showing the world their spite and willingness to engage in lawfare at their political opponents.
Are you including E. Jean Carroll among the Democrats waging lawfare against Trump?
I don't believe that we're seeing anything other than a criminal being indicted by impartial grand juries for obvious crimes and sued for various torts, several cases of which he has already lost in verdicts given by impartial petit juries, but even if you were correct, so what? If the Democrats can convince juries to convict Trump to keep him out of power - a hairbrained plan since the country is heavily populated with people who don't seem to care if he's a criminal and will vote for him anyway - then literally, more power to them.
Trump and MAGA Republicans are judged by a different standard than people who respect the Constitution and the rule of law, and if it is possible to neutralize them and dirty tricks are required - the kind one would consider immoral if applied to like-minded people with shared values and agendas - go for it. MAGA is an enemy of America as surely as Putin is and is entitled to no more forbearance than he is. If you're going to attack your country or support those who do, you should expect to be viewed and treated the same as foreign enemies.
So, you'll get no sympathy here complaining about how unfairly Trump is being treated - not that you need to, since along with how much he hates assorted people and classes of people, and his unhinged rants about sharks, electrocution, and cannibals, that's just about all he talks about.
One can't be unfair to a person who has never been fair to others in his life. Here's fair: Trump ends up in prison for the rest of his life, broke, and humiliated - the vengeance he wants for others who criticize or defy him - and in a perpetual demented cloud of rage and grievance as well as the kind of fear for his life that he likes to create for others.
You might call that unkind or unnecessary, but you can't call it unfair. Unfair would be him being free and living well.