Sometimes there is scientific controversy or a difference of opinion. The big difference is that in science it is not geographical or tribal. Take for example the nature of ball lightning. It would be impossible to predict a scientist's opinion on the subject depending on whether they live in Pakistan, India, Italy or Israel. Contrast that with religion, where the "truth" is different depending upon what tribe you belong to.

Nice contrast! While there is often vigorous debate among scientists, there has never been a war over whose science is the true science. Scientists have better ways of settling such disputes. It's called evidence.