Gallup's 51-46 majority against removing Trump from office is the single largest majority against it out of the several dozen polls asking the same question over the same period - see link. Many show an equally large or larger majority in favour. Of course, since the margin of sampling error in Gallup's poll is +/- 4 percent, it doesn't prove that a majority is against even if you don't consider any other poll.
Bottom line: it's somewhere quite close to dead even and you can't tell for sure if a majority is for or against. Which anyway depends on how you phrase the question. So I find it somewhat ironic that you complain about the news not fairly reporting on this poll, when you've presented (quite possibly by accident) the most outlying poll out there and drawn a rather doubtful conclusion based on it about the majority of Americans.
As for his approval rating, there as well, if you look at the wider picture, it's not that clear if it has really increased. It's certainly still around the same level it's been all along. And if it has increased, who's to say it's on account of the impeachment and not, say, the deal with China?
What's scary, regardless of what party you favour, is the way polarization has reached the point where there's barely any distinction anymore between whether an American disapproves of a president and whether he wants him removed from office through impeachment. And barely any distinction anymore between whether he voted for a president and whether he disapproves of him. It has become all or nothing, all-out partisan war to the death. The Democrats were never going to convince any significant percentage of Trump supporters, regardless of how well they made their case or regardless of how flagrantly Trump violated his oath of office and the Constitution. His own example of murdering someone in broad daylight on a New York street might seriously be the minimum level required before a critical mass of his supporters starts to think twice about standing by him - and plenty would still do so even then.