Question

don't trap by dogma make it affirmative sentence

Answer 1

be careful from dogma
is the right answer

Answer 2

Affirmative sentence is a sentence which is in agreement or in support of something. In this case, the sentence is don't trap by dogma.

The affirmative version of the sentence will be - Yes, I will make sure not to be trapped by dogma.

Basically, the affirmative sentence is agreeing with the original sentence.