Of course I don't morally agree with crucifixion, but back in those times it would have been justified if he was not the son of God. There had been many false prophets and once they would get as many followers as Jesus had the government leaders had them killed in order to maintain control.
Under no perspective could the crucifixion be considered a just one, He broke no Roman law. Pilot bent to the pressure of Jewish Rabbi that he had the authority to ignore. Jesus caused no unrest with the Roman Government, and even discouraged the use of the sword to up rise against whenever asked.