The fundamental principle of all religions is to try to be a good human being, though there are different ways to achieve the goal. Our Prophet Hazrat Muhammad (Pbuh) is the truest human being the world has ever seen. But some people, who claim to be the followers of Islam, engage in activities that violate the basic tenets of the religion.
We saw their heinous activities in 1971, they are still working under different names-- Taliban, al-Qaeda, JMB etc. We must resist them.