Complex sentence: Public opinion turned against the Fords for betraying their gang leader, and Robert was seen as a coward and traitor for killing James; this warred with the opinion that it had been time for James to be stopped.
Split into simpler sentences: Public opinion turned against the Fords for betraying their gang leader, and Bob was seen as a coward and traitor for killing James. This sentiment warred with the opinion that it had been time for James to be stopped.