Sure, the USA (as well as the UK, etc.) have very diversified populations and it's not unusual to see children with different looking parents. I wouldn't worry about that at all if you start communicating with any western man. If he has children and is communicating with you, obviously he must not care. I don't think most westerners (from anywhere) would even think twice about it.

I see you're looking exclusively for men from Europe but I would be very surprised if most western European countries were any different than the USA in regards to this particular outlook. Asians are everywhere!