Conversation so far:
How did Emiliano Zapata die?
On April 10, 1919, Jesús Guajardo invited Zapata to a meeting. When Zapata arrived at the Hacienda de San Juan, in Chinameca, Ayala municipality, Guajardo's men riddled him with bullets.
What was Emiliano Zapata doing at the Hacienda de San Juan?
Guajardo invited Zapata to a meeting, intimating that he intended to defect to the revolutionaries.

Question: Was Guajardo an enemy?
Self-contained rewrite: Was Jesús Guajardo an enemy of Emiliano Zapata?