Question

Why did the Zimmerman Telegram push America into war?

The sinking of the Lusitania only had a few Americans on board, so it did not upset too many people.
It implied that Germany would join in war against the U.S.
It threatened to assassinate our president.
It was designed to get all of Europe against Americans.

Answer 1

I believe the answer is that it implied that Germany would join in war against the U.S.

Step-by-step explanation:

Germany was sinking US boats and that had many Americans mad, then the US got a hold of the Zimmerman telegram and that is basically what pushed them into war. I hope this helps.