They failed and the next two years were a sequence of minor scale violent events that ended in a war in 1936. Of course, the coup by the military forces is not justified, but the caotic situation made them choose what they thought was the "lesser of two evils".
There was a failed coup by the PSOE and left-leaning political groups in 1934: https://en.wikipedia.org/wiki/Revolution_of_1934
They failed and the next two years were a sequence of minor scale violent events that ended in a war in 1936. Of course, the coup by the military forces is not justified, but the caotic situation made them choose what they thought was the "lesser of two evils".