If you do not recognise a media source it may be necessary to do some reading or indeed digging yourself. Most people know the degree of bias of even "reputable" newspapers and will interpret comment accordingly, but mostly you can be sure their news coverage is responsible.
"Comment" is simply that, different journalists, like different people, have different opinions but we as readers need to take some responsibility too. Of course we don't take everything at face value (particularly some of the possibly entertaining but often dubious tosh on the likes of Facebook.)
To contradict another poster in another place, you need to read as much as you can so that you can discern the difference. Be aware of shades of bias, learn to spot them and most of all, try not to be gullible. If people only read The Sun it is like a diet of one type of junk food. So just as eating a mixed diet can keep you healthy, a varied "reading" diet helps to form a healthy sense of judgement.
Although this cartoon I spotted is a tempting reaction, and I apologise to those who have seen it before.
BTW The New European is reputable - you don't have to agree with its stance, but I think it is responsible.