Most people who use bro are being at least a little ironic. It's a weird register to use for a Austrian man born in 1905. Wouldn't be a big deal except that it'

Most people who use bro are being at least a little ironic. It's a weird register to use for a Austrian man born in 1905. Wouldn't be a big deal except that it's literally the Holocaust. Not personally offended, just explaining why most people will probably not take it the way you mean.