....I am deeply disturbed by the problems uncovered in these hearings at the state dept
The pres determined FP, not them. But clearly it has been them for a while now before Trump
These guys have openly admitted that they have taken FP actions sgainst the potus desires when they saw fit. They have been operating as a shadow govt .
The Ukraine in particular was a focus of the Obama admin and it isnt surprising to find multiple anti Trumpers there.
Are you familiar with the Civil Society initiative fin Ukraine under Obama? This is a rats nest of corruption in Ukraine, and in the State Dept. You can google.
Back to your question - I reject your premise that a only Schiff selected testifiers represent "everybody", but for the reasons above, I am not surprised that Schoff had quite a few volunteers under threat of losing there power and because of their personal politics as well.
I also point out that none of these people are "witnesses" because the didnt witness anything. They openly admit that they simply presume or guess, snd they are arrogant enough to think that from them, this is enough without evidence to impeach.
As Ned pointed out, they sre simply advocating.