> I'm not exactly sure how to write a history paper.
Start with a point you want to argue. Lay out explicitly what you're trying to demonstrate (or disprove). It probably is best to pick something specific, but lay it out very clearly in your introduction. Then, go through all your evidence, and forge it into a narrative. At the end, show how the evidence supports your position, and acknowledge whatever weaknesses you might have, and why they're not such a big deal.
>What's the point of reading the original sources if I can quickly know what happened through wikipedia? When should I quote primary sources?
Think about it this way. Pretend that your paper is going to be read and has to be justified to the most disagreeable, obnoxious, retarded jackass who ever lived. They will not believe you if you claim that the sun rises in the east and sets in the west without you backing it up to an almanac. You cite your sources to prove to this hypothetical reader that you're not just making your shit up, and that things happened the way you say they happened.
>I want the thesis something to do about Jesus, the 2nd temple and Rome. What should my thesis be?
You could do one about the Sadducee-Pharisee confusion in the gospels, and possibly what role, if any, the differing Roman attitudes had on the two sects had to do with the formation of the Gospels.
You could do something about why the Romans have such a "quiet" presence in the Gospel narrative, with little indication of their presence outside the Pilate execution narrative.
Perhaps something about why you suddenly had a rash of apocalyptic preachers right about then, when Judea had been under some sort of foreign occupation or at least heavy influence for centuries, and the Romans weren't that different from the Selucids and Ptoelmiacs who preceded them.
Really, what do you want to write about? Why are you interested in this period?