What is your logical argument to support these statements?
My logical argument, well let's see. I'd say that life forms are basically sophisticated forms of chemistry that reproduce. Life started off as a self-replicating molecule, evolving gradually over time into more complex self-replicating molecules, eventually forming the first single-celled life forms, which then continued developing into the multi-cellular life forms of today. Life forms are born naturally into freedom and must seek food to reproduce and also possess the ability to protect themselves from other life forms that would kill them (usually for food). As such, all life forms have a natural right to protect themselves as self-protection is a part of existence for all life. Life forms are free unless another life form seeks to oppress them in some manner. With humans, since we are so prone to killing each other, one way for us to live peacefully is to create a government that protects our pre-existing natural rights, such as our right to protect ourselves. Other natural rights are things like one's right to live their life as they please so long as they are not harming anyone else, right to free speech, right against unreasonable search and seizure by the government, right to privacy, etc...
You're trivializing the distinction by appropriating a relative definition that is irrelevant to the discussion. An iron, candlestick, or pipe, can be all used as weapons similarly. They can also be used defensively in similar contexts as well. But why doesn't a dictionary define these terms in those respects. You won't find the definition of an iron as a device that can be used as either a defensive or offensive weapon to harm or protect oneself. in any dictionary, even though they are true. You're evading reasonable argumentation by diverting the ordinary meaning of what weapons or defenses actually functionally and intentionally mean.
Okay, you mean tools that are specifically designed to be used as weapons. However, I wouldn't put a shield into the same category as say an iron or a pipe. A shield is specifically designed as a tool for war, and depending on the design, can serve as primarily a defensive device or equally an offensive or defensive tool. For example, the Greek hoplites carried a shield that could also be used to thwack their opponents with.
Define good and evil; right and wrong.
In this case, I'd say evil is when one person, group of people, or philosophy seek to kill and/or destroy other peoples because it disagrees with them in some way. Good is when one is not evil.