It doesn't matter if I read it from a tattoo on your mama's ass, it is a direct quote from The US Constitution. Its validity is not dependent on 3rd parties that reference it. Run along now with your hive mind buddies and work on your next attack strategy.
The quote doesn't say that impeachment is a criminal trial, you're just stretching it to that meaning because you really want it to mean that.
Andrew Johnson was impeached for - among other things - ridiculing the Congress "in a loud voice". Such a horrible crime.