A moral question: I would like to know what comes to your mind thinking about it. Should I kill a person to prevent this person from killing many others?

Even not looking at it from a moral point of view, as long as we are humans, even if told to kill, we can not. But most news nowadays is about murders, violence, wars. This shows how little humans are aware of themselves - the human wisdom has become poor. We are 7 million people on this planet, yet we are connected - this is the human wisdom we need to awaken to. Religion is not about dividing but about giving everyone the chance to realize this wisdom. If we cannot see it in this way, then religions, nationalities, beliefs become reasons to divide and thus also tools to kill with. The Buddha said clearly: do not kill. Sadly enough during the Second World War mistakenly Buddhism supported the war. That is extremely sad. When we see this clearly we can see, that all ideas and belief systems separate us and give us a seeming reason to kill. There is no possible excuse as a reason to kill another being. We need to awaken to this. That is our base.