I would back the Serbs more in Bosnia if they'd done something worth backing them for!
Let us assume, for a moment, that you are a Westerner and/or that you care for the US. In that case I can tell you that you can back up Serbs or Muslim. What happens when West arms, equip and train Muslim forces we saw in Afghanistan sooner or later they will turn on you. If that is OK with you so be it. You do your work - as for Serbs Patience - Rescue".
Who started war in Bosnia:
1991 --- VOX magazine cover from October 1991 showing Bosnian Muslim soldier in Nazi SS Division Handzar stepping on decapitated heads of Serbian leaders. Caption reads: "Spremna Handzar Divizija" (The Handzar Division is ready).