I fully agree with the first paragraph.Ok, can we start with the wikipedia entry titled "Karma in Hinduism"? This is the first paragraph and a bit:
Karma is a concept of Hinduism which describes a system in which beneficial effects are derived from past beneficial actions and harmful effects from past harmful actions, creating a system of actions and reactions throughout a soul's (jivatman's) reincarnated lives,[1] forming a cycle of rebirth. The causality is said to apply not only to the material world but also to our thoughts, words, actions, and actions that others do under our instructions.[2]
For example, if one performs a good deed, something good will happen to them, and the same applies if one does a bad thing.
Would you say that the entry here is incorrect?
In the second paragraph, "something" is an oversimplification, and the paragraph is taken out of context.
It's also useful to click on the first link in your post and learn a bit more about what the term 'karma' actually means.