I am sure Trump will also get away from getting impeached because of recent Iranian general killing.
Technically, both presidents (Clinton and Trump) were indeed impeached, but that is only half of what takes for them to be removed from office. Much like Clinton, the senate will probably acquit Trump, meaning he won't be removed from office. However, I do agree with you that this whole thing with Iran likely serves to create a distraction away from the whole impeachment issue.
I always wondered what it meant to be impeached. Clinton was impeached yet he was still President and fulfilled his full termed. It's pretty much a waste of time what they are doing.
Its symbolic, at least, but more importantly a message that a president simply cannot do whatever he wants, when he wants.