If hes just being rude, honestly just stay in your room or something until he leaves, or maybe even tell your brother about it so maybe he'll say something to the friend. if he keeps bothering you even after all that, just tell him to leave you the FU€K alone. best of luck!!
It most likely gives a negative connotation because something being on fire is usually not a good thing. So if your marriage is on fire it is probably not going so well and may need to be put out or in other words Divorce
it says "to secure these rights, governments are instituted among men, deriving their just powers from the consent of the governed." which granted rights to the newly freed slaves
The paragraph first says what is being compared and contrasted, then it says what they have in common by using the word "both." The phrase "on the other hand" shows that they're being contrasted.