We saw regime collapses in the Arab Spring - it's not a simple or short process, most regimes survived (either directly or via reversion). Even when a regime was overthrown, the replacement was usually not more hostile to Israel. e.g. Syria isn't more hostile than it was. Thing is there isn't all that much 'fury' since Arabs already assume the worst of Israel, while reasons for relative peace remain as is or are actually strengthened by the revolution process (e.g. economy, desire for quiet following violent revolution, new regime wanting to establish itself, etc.)