Review on Article "Chopper-wielding gang slashes teenager in Tampines

This article relates the incident where a teenager was walking home and then suddenly he saw a group of 9 youths. He looked at them one by one and consequently he was asked to stop and when he tried to answer, one of them whipped out a chopper from his trousers and the rest followed, and proceeded to hack and slash him.
I personally think that the fault totally lies with the youths who attacked. It is hypothesised that they were looking for a fight as they already had choppers with each and every one of them. However, I think that the incident happened not just because of the youths. I think there must have been a reason why the incident was sparked off.
In the newspaper article, it was mentioned that the victim had looked at them before they attacked him. This may have caused the misguided youths to feel that they were being treated as out of the society and hence felt that they had to stand up and fight for their own rights, and hence impulsively started attacking the victim. The looking at them in a way would have been a catalyst for the incident to happen. Hence, although it was not the fault of the victim that the incident occured, he could have always taken preventive measures to prevent this from happening, for example, by not looking at them in a strange way. I, however, do not feel that the fault lies with the victim as looking at somebody passing by can be natural especially when you have a feeling that one of them looks like your friend from an angle but you did not get to see clearly. Hence, I think that we must be careful how we treat other people, not just with the way we see them but also how we speak to them and how we interact with them. Therefore, the fault actually lies with the attacking youths as they had no reason to attack even if provoked. Violence definitely does not solve problems as your opponent will not see the light in what you believe in and hence will eventually stand up and fight for what they think is right, and so violence should be abstained from at all times and in all situations.
Also, another way to stop this from happening is to have your own opinion in a group and not follow the leader as I believe on their own, the youths which attacked would not have resorted to such a degree of violence even if they were provoked. In a group, if you just follow the leader, you can be mislead very easily and do things that will later seem totally silly. Also, thinking before you act is extremely important and can make you abstain from doing things that you would potentially regret for the rest of your life. Stay in a group. Have friends, but it is important that you do not lose your mind and opinions in the process.