The fact that you are able to type the above rubbish is because that it was the Muslims who laid down the foundation of science such as algorithm and Algebra. It was the Muslims who shaped the modern world. At that time when the so called westerns were living in caves so please spare me your PC talking about 7th century mind set. Don't cite the actions of the individuals who invoke in the name of religions be it Christianity (Lord resistance army in Uganda, Crusades, Spanish inquisition, Europe colonialism in Africa and Asia..etc) , Judaism(Cave of the Patriarchs..etc) or Islam(9/11) for their own goals. Had Muslims been running Europe today six million jews would still be alive today. How many Christians are living in majority Muslim countries? Syria, Egypt, Palestine, Jordan, Iraq, Lebanon/Jews in Morocco, Iran, Azerbaijan...etc. So if Muslims believe in killing the infidels as you mentioned how come there are many non Muslims still living peacefully today in majority Muslim countries? All the battle fought by the prophet was defensive and not offensive. When people come to kill you will you offer yourself or defend yourself?
Talking about slaves forgetting that modern slavery of Africans by the US that ended up what a hundred years ago. In fact Islam was the first to introduce social justice and promote equality. Islam came to abolish slavery not to encourage it. Islamic views on slavery - Wikipedia, the free encyclopedia
Coming to your second you point where you talked about Muslims wanting to destroy the western civilization? Last time I checked, it was the US who invaded Afghanistan, Iraq, african countries. So you come to our lands to destroy our people and then blame Muslims for any resulting reactions! Don't you also dare to impose your western values on others. Every society has its own value, tradition..etc. So don't expect Muslims or any others to accept your own version of morality..etc
Third point about the Prophet Mohammed who was selected as the most influential person ever walked the earth.
The 100: A Ranking of the Most Influential Persons in History - Wikipedia, the free encyclopedia
Every society has its norms, in the US some states still allow marriage at young age. in Europe too, the Gypsy men marry to six, seven years old. Now prophet Mohammed didn't
married Ayshia when she was six years old rather 9 years old. The marriage wasn't about sex because the prophet didn't have sex with her until she reached puberty meaning that when she became matured. He married her to prepare her for the message given to him. All of his wives were widows except her. No one objected to the marriage at that time. Ayisha is called as the mother of the believers by the Muslims. The tribes who rejected his message offered him the most beautiful women, afford him money...etc for him to give up to preach the message of Islam. He simply rejected all of their offers.
Finally, Taqiyya is not part of the Shia doctrine not part of Islam.
Ignorance is bless indeed. You are just the other part of the coin of what you called Islamic extremism although Islam is a centered balanced religion which means there is nothing called islamic terrorists/extremists. Extremists are extremists and terrorists are terrorists and these two have either political or strategic goals and ARE NOT motivated by religion period.