Why is an “anti-intellectual” ideology damaging for science?

An "anti-intellectual" ideology is damaging to science because as the word states is that it is not based on intellectual theory.

To have an ideology that is anti-intellectual (not using intellect) is having a theory about something that can not be proven by factual, reputable and tangible evidence from a reputable, current, and relevant source.

Idont know but good luck; )