including him/himself

No. It should be himself. When a person is talking about actions concerning themselves, we use a reflexive pronoun. He is speaking about police actions against (other people and) himself.

He spoke about police actions against himself.

I spoke about police actions against him.

Tang, okay (except for one missing after "quick,") there's a trend away from commas so mebbe you could lose the other two

He alleged that the police inaction on matters surrounding 1MDB was in contrast to their quick, stern action against those, including himself, who criticised the state investment firm and Prime Minister Najib Razak

PS: Can you see thiose two fuzzies

Thanks to both of you.

Quite welcome Tang. By the way can you at all see those two faint commas