Right like the ~400 subpoenas on Republican lawmakers by Jack S with the tenuous linkage to the Jan riot. You might have reason to subpoena 10 or even 30 lawmakers who may have had some linkage but going after ~400 seems dubious.
An event like the Jan 6th putsch attempt would, in pretty much every democracy that has got some sense of self-preservation, result in at the very least intense public hearings, and outside of the European Union that bans the death penalty under all circumstances, followed by the chief perpetrators getting strung up at the same gallows they brought to hang Mike Pence off of.
The fact that barely any consequences came for those instigating the putsch, except a few of those dumb enough to do stuff like parade around in front of cameras, is completely inexcusable.
Subpoenas are an investigating tool. It's part of gathering the data. I think you may be confused. It's not in any way a punishment.
Do you think at that point he had it out for Republicans in general? Republican congressmen were appalled by what happened on Jan 6th, and it was only because they thought Trump would just go away that he wasn't convicted in the Senate.
Trying to frame that investigation as some sort of political witch hunt is ridiculous.