Because they know that He exists, so they are trying to find out more about Him.

I quote that although threatening people needs to be mastered.
You mean stopped, not mastered, don't you?

He probably mean mastered, thats what you religious guys do, and us athiests oppose.
Atheists threaten just like anyone. Religious people warn.

Oh you got it so wrong buddy, give me one athiest who threatened. But I can see plenty of threat or should I say "warnings" here from religious guys with one example being in the current page.
Since atheism is a religion, they are religious guys who at times threaten, just like all kinds of other religious guys.

Its not a religion , I don't know how you can call a group against religion a religion cause that would be stupid.