He was the first calif to continue the legality of Mohammad’s banquet of blood. The name Sidiq was inscribed by Mohammad (his son in law) to mean “the truthful one”.
After the death of the Prophet, the caliph Abu Bakar organized the invasion of Syria to do the job of advancing the religion. During the campaign of 634, the entire region between Gaza and Caesarea was devastated; four thousand peasants, Christians, Jews, and Samaritans who were simply defending their land were massacred during the campaigns in Mesopotamia between 635 and 642, monasteries were sacked, the monks were killed, and Monophysite Arabs executed or forced to convert. In Elam the population was put to the sword, at Susa, all the dignitaries suffered the same fate. The patriarch Sophronius of Jerusalem (634-638) saw the invaders as “Godless barbarians that burnt churches, destroyed monasteries, profaned crosses, and horribly blasphemed against Christ and the church. In 639, thousands died as a result of the famine and the plague as a consequence to the destruction and pillage.
The Arabs had always been a race of warriors who lived by pillage and the exploitation of settled populations. Islam was a war machine that did not stop at anything once it had been set going. War is a normal activity in such a military theocracy. The Arabs did not even search for a motive to conduct their wars; their social organization needed war, and without victories it would have collapsed.
Remember: For Mohammad, the truth is success at war and wrong or false is failier at war. Death is a solution and victory in a measurable form.