Is "considering stealing" grammatically correct? [duplicate]

Solution 1:

The idiomatic phrase is to consider something to be something ("to be" can be omitted). It means:

to have a particular opinion about someone or something

• consider someone/something (to be) something: e.g. We all considered him a hero. (Macmillan)

Your sentence

X is considered to be Y

is a case of passive voice. X does not perform the action of considering, but is itself considered (by people in general) to be Y.

Here are some synonyms from WordHippo that could replace is "considered" in your sentence:

... since it is believed/deemed/reckoned to be stealing. (you cannot say "since it is believing [to be] stealing)

Note that you can also use as with these phrases:

... since it is considered/ believed/deemed/reckoned as stealing.