The French did not have the manpower to invade Britain, you may, or may not understand that throughout nearly of of the 18thC France was in competition with Britain, and would use any tactic it could to make life more difficult, this is the nature of warfare, especially on a global scale such as this.
At stake, the entire world, when you think of the 18thC and 19thC, and you look at the dominant world powers, they were in a struggle for complete control.
Do you not understand the meaning of 'pax Brittannia?" This was no idle boast.
The overseas power of France declined dramatically once it’s dreams of expansionism had been crushed by the British, and that was evident for all to see throughout the 19thC.
The only reason the Irish were encouraged to rebel was the hope of support by France, and the only reason France fostered that hope was in turn to distract or diminish British power.
It is not very difficult to work out.
While we are at it, the French revolution added a good deal of spice to the mix, because the struggle between these empires in this period was not only about power, it was about idealogy, and also religion.
The war with Spain was pretty m uch the same thing, and you need only to look at the Catholic excesses in the Low countries, in the German States right through to eastern Europe to see what sorts of atrocities and repressions were undertaken in the name of the ‘Holy Roman Empire’. You can be well assured that the British, ahving fought for hundred of years, having funded and supported the anti-papists throughout Europe, would certainly not allow anything remotely resembling a Catholic takeover on what it would have seen as being firmly in its sphere of influence.
This is one of the constant moans you get from the Irish, that the British just went in and carried appalling acts in their lands (which they did) becuase of some anti Irish sentiment, instead of acknowledging that actually, this was a strategic matter, one which operated right across the globe, and that the Irish themselves had an unfortunate knack of bad timing and selecting pretty piss poor allies.
The Irish like to see themselves as victims, when their leaders were trying to become players.Sorry boys, play the big boys games and you’d better be able to handle it. In the end, Britain itself was not big enough, and still tries to play with the big boys, to its cost.
If you want a more recent comparison, all you need do is look at the Munroe doctrine, or the current situation in the nations around Russia, that’ll give you some idea of how it played out.