[electromagnetic]

If the Gunpowder Plot had succeeded, it wouldn't have been the destruction of parliament that would have been the issue, it would have likely been a full out campaign to kill every catholic in Briton by the most gruesome methods possible. The public reaction to the Gunpowder Plot was very 9/11 in terms of public opinion against the Catholics. In fact the Gunpowder Plot likely delayed the Catholic Emancipation by potentially two-centuries and increased intolerance towards Catholics quite dramatically.

Honestly if the Gunpowder Plot had succeeded, I have little doubt it would have turned into a massacre of Catholics in Briton and likely devolved into a full out war. Ireland would have received a full massacre for the guerilla war it had waged against Briton, and Spain would have likely come under full attack for supporting the Irish Catholics during that time.

It would be hard to see any result that isn't total war for a successful bombing. Ironically the plot was the worst thing to happen to Catholics but simultaneously the best outcome for the situation.