if i smoke ciggarettes - i am responsible for that decision because i caused it, not because i am answerable to any other authority. it has nothing to do with any morality or responsibility for all men - that makes no reeal sense - there is no judgement standard
To understand how Sartre makes the logical leap from having responsibility and choosing for yourself and this being the same and equivalent to having responsibility and choosing for all - meaning everyone on the planet - is a bit complex and would not only require a bit of time and space but my brain to be working, which at 3 am it isn't. Tomorrow or in a PM I will try and describe this part of his philosophy to you if you want, it is interesting and on the most part I completely agree with him.

PJ, if someone chooses something, NO MATTER what they say, they actively choose to do the action. It does not matter what reasoning they used or what they think they really 'feel', at the end of the day they choose to do a specific action when they could quite easily have done something else. Someone choosing to smoke cigarettes, but feeling they don't really want to smoke cigarettes and are being 'forced' into it by their peers, is deceiving themselves. They could quite easily choose not to smoke cigarettes, but to try and make their choice easier on themselves, for whatever reason, people will try and deceive themselves with a whole host of reasons. Including coming out with statements like, 'but I really didn't want to smoke! My friends MADE me!' Rubbish.

As Sartre stated, yield or die, is still a choice. A nasty choice between giving in or being killed, granted, but it is still a choice. It is self deception to think 'I really wanted to not give in, but he had a gun!' If you yielded you choose to yield when faced with the circumstances, simple as that. You cannot claim things which you have not acted upon, simple as that.

Once you realise this, it is quite empowering, give it a go.

BP - why do you think everyone has compassion? I really do not think so, there is no universal trait everyone has which is not due to DNA. Emotions and traits - such as cowardice or honour - are all created ourselves by our choices. There is nothing such as compassion which people have just for being human, that form of human nature I will argue about forever, it is rubbish.