Did you think rights just floated down from the sky, mana from heaven?
No, they're inherent to the fact that we're living, sentient beings with dignity and value.
No, rights cannot be "given" because something given can be taken away. Privileges are given and privileges can be taken away. Rights are inherent (see above) and can only be infringed inasmuch as we allow them to be.
That doesn't mean that, as you claim, there is no such thing as the word "rights" and every time anybody says "rights" they really meant "privileges."
Strawman; no such claim has been made. Precisely the opposite. On the other hand, sometimes people say "rights" when they mean "privileges" and vice versa.
It does mean that words have context, and that the meanings don't always align with extremist principles.
There's nothing extremist about living, sentient, valuable individuals having rights. Whether you believe they're inherent to the existence of that individual or endowed upon them by their creator is irrelevant. In either case, the individual is naturally provided with their rights as a fundamental component of their existence. Once this is understood and accepted, it becomes obvious why no law or act of violence can rob you of your rights; rather, merely infringe upon their free exercise. As limited creatures, we lack the requisite ability to alter the fundamental nature of mankind.
Put another way: you can prevent me from exercising my right to self-determination or my right to self-defense, but you cannot eliminate those rights. You can - at worst - kill me.