May you actually read the posts?
If /I would have read those posts I probably would have came to the conclusion that your are either trolling or you don't know what you want or you want something you will not get here.
If you want to trace your ancestry you need to hire a professional agency which will do that for a hefty fee.
Nobody can tell you what ethnicity and to what degree your grandfather was with only his name and his picture as a clue.
Also, I heard that a large group of Walloon and French people settled in Silesia
Don't let it confuse you!
Was he born in Wroclaw, when he emigrated?