"But wasn't it the equally elected parliament impeach the president? "
When the Parliamentarians can look out the window and see a mob burning police alive, that's called, "coercion".
Therefore, it was not a legitimate vote by a legally elected Parliament. It was a vote made under duress at best if not outright made at gunpoint.
When police burn near me, I start shooting. I do not believe in shooting the dog unless the dog gives no choice. I do not believe in shooting period unless ... I have to let them decide.
OK, so you admit that the vote happened, but somehow the members of parliament were under duress.
Do you realize how ridiculous that sounds?