Less or more involved does not matter. I don't agree with you being "lesser" involved anyway. You are part of the same coalition that is rightfully against Al-Assad AND ISIS. West is not only composed of tiny Britain. You know that, right? US for instance has been heavily involved in terms of weapon deliveries too.
"Billions upon billions" is a huge overstatement.
Wait a second? Did you not just write that your government has not send any weapons and now you are "appalled" because your taxes are going to provide money to "rebels"? You are contradicting yourself.
Hold on for a second. Last time I checked it was not the FSA that we support, that besieged M'aloula but Al-Nusra who kills everyone that opposes them. Including other radicals (ISIS). Also those are non-confirmed rumors anyway. FSA were not involved in any crimes.
You forgot that Syria is an Arab country. Thus my fellow Arabs are suffering the most. Why should I have any interested in them suffering? Moreover M'aloula is also home to Muslim Arabs and the Christians who live there are both Arabs and the Syriac Christians who live in M'aloula are fellow Semites. Besides the Muslim Arabs of that city are better speakers of Aramaic.
Which you can see here in this short documentary;
Moreover Aramaic is closely related to Arabic and quite a few people actually are able to speak it due to studies of it.
So no by no means did I like the scenes there but don't blame the FSA for that. The Syrian opposition has Christian members too and FSA has many Christian members too.