there are many reasons for France:
- Fabius having a bad souvenir from Asad (personal reason)
- Hollande president is the most unpopular president ever right now and he tries to find everything to hide he is not able to lead the country and save economy. except increases taxes for companies and workers and make the country even worst (France is champion of "rente" country. you don't success with work but with heritage)
- your president attitude is unpopular. not caring of people wills. Asad said himself there was no fair reason why people have protested
- you have the support from groups which are not popular in west : hezbollah and iran
and so
if Asad wanted to change fairly the country, he would decide to stop and make someone one temporary president
until elections controlled by UNO
you can understand a part of your country hates your president. a normal president , if he cares about its country, would leave to appease, to calm down, to save the country. he can come back later if people accept .