1 You are being ridiculous to think any aid could be shut down to Ukraine after all of this. They are under no threat (and never have been). Your point is false, but....
2 In the bigger point, you use false logic and then apply it selectively:
Under your logic, we can only believe Trump’s staff testimony if it is against him since they could be fired for turning on him. He can’t be found innocent by you.
Did you apply your logic to the Dem witnesses who are at risk of being ostracized and ruined if they don’t testify against Trump? There are lots of other examples of this.
You don’t get to selectively dismiss real witnesses to fit your desires.
3 your going to impeach a POTUS over this garbage where the witnesses say it didn’t happen, but you say, ”they’re lying, I just know it!”!!
You are thinking from the perspective that Trump is assumed guilty, and that he has to prove his innocence.
A mazingly, there is indeed evidence to prove that innocence, but the you selectively say”I don’t trust it”.
That is ironically very Russian of you.