In The Outsiders, after Johnny kills Bob, is Dally's advice any good? Why do the boys think they need to run?Dally tells them to run away

Dally tells them to run to a church in the countryside. He
gives them money and a gun, telling them to lie low for several days. The boys need to
run because they killed someone,someone who is a Soc. Soc's have connections to the law
and the middle class who tends to have more clout than the Greasers do.  They are
Greasers, so the law will assume they did it intentionally even though it was in self
defense. Dally's advice is good, except it makes the boys look guilty. The church is
isolated, and no one will think to look for them there. As fate decrees it, the church
fire will result in the boys looking like heroes when they rescue the kids from the
burning building. The public will look on them more favorably compared to them having
stayed to face their punishment.