Tensions are heating up in the Middle East as Israel has taken a controversial step by sending its troops into Syria. Washington has supported the move, calling it an act of “self-defense,” but many nations are calling it a violation of international law. So, what’s really going on, and why is this such a big deal?

What Happened?

On Sunday, Israeli forces crossed into the demilitarized zone of the Golan Heights, an area that has long been a buffer between Israel and Syria. By Monday, ...