You're lumping all scientists in together, when there are clearly two different groups here. Furthermore, later evidence has shown how terrible the evidence was

You're lumping all scientists in together, when there are clearly two different groups here. Furthermore, later evidence has shown how terrible the evidence was for "Vaccines cause autism". The study that started this controversy was ridiculous. It used a ridiculously low sample size, the scientist conducting it (Andrew Wakefield) had severe conflicts of interest that basically lead to fraud, and to top it all off, the journal that original posted the paper retracted it.