I can promise you that I won't touch you or your property first but it seems like you aren't willing to offer me the same respect.
Actually I can promise you that I won't steal your property because I have all of the property I need and more (which isn't that much). Even if I lose all of my property, I can rely on the welfare state to provide for my needs so I will not have a valid reason to steal from you.
if one of us can't convince the other to change his mind, the only alternative is violence.
There are plenty of other alternatives. The one I favour is respecting each others opinions while disagreeing. My morality will prevent me from initiating violence anyway and even in the case of self defence, I will look for alternatives (such as running away).