Your statement means nothing. It is true and false.
Sometimes, pacifism does facilitate evil - as does a bellicose attitude.
Sometimes, pacifism prevents evil - as does a bellicose atitude.
Often, we will never know exactly what either posture actually facilitats or prevents, thus such mindless sloganeerign is no better than the mindless sloganeering of the leftish ones ("give peace a chance" "make love not war" etc.)
I disagree. Pacificism may prevent evil if one is dealing with decency to begin with, such as Ghandi with the British, or the efforts of Martin Luther King, by which right and good prevailed essentially because the outreach was to a people who are predominantly good, i.e., Americans.
Otherwise, pacifism facilitates evil.