Unfortunately, that's not a very good quality website. On the plus side, the author a) makes it clear that she is not a research scientist or medically qualified and b) she is not selling anything (other than the idea that MSG is bad).
However, the views are those of a single author and the nature of the references (many studies are in vitro, rodents, or use high doses unlikely to be found in the diet) suggests she has chosen the belief 'MSG is bad' and then searched for any publications that might be used to support that view, however tenuously.
In contrast, the scientific approach would be to ask the question "Is MSG bad?" and then systematically review all publications which relate to this question and be careful not to cherry-pick those which support a preconceived belief.
A good tip when trying to find out information in an area outside your own expertise is to choose publications from reputable bodies rather than those produced by a single author. Some examples are:-
- World Health Organisation
- European Communities’ Scientific Committee for Foods
- Council on Scientific Affairs of the American Medical Association
- Food and Agriculture Organization of the United Nations
- United States Food and Drug Administration
Organisations like these will use expert committees to review all the evidence and weigh it up before pronouncing judgement.