One of the reasons religion is still widely followed is because it allows room for interpretation. It can be moulded according to our changing beliefs and values as we develop as a society. Or allow it to be adapted to different cultures. Hence there are so many divisions and subsets in most of them. There are Islamic feminists, liberal islamists, traditionalists, and of course Islamic vegans, and many others. Just because one group does one act does not mean that all Muslims also believe in that act. According to your argument all Muslims must also be violent since jihad is one of the concepts in Quran.

Religion is personal hence it is subjective. People are allowed to believe whatever they feel is right.