Let me ask you the question. Why is he wearing the colored shirt and the colored nitted Yarmulka?
Now lets go further. If a guy wears a nice knitted winter hat, which covers his whole head (much bigger segulah for yiras Shomayim), would you want him for your daughter? Why not, is he less Frum? Does acceptance of other peoples mishugassin and ideals only work one way??
You know as well as I do, that a long jacket is a statement; a big peace symbol on the front or back of my shirt is a statement; a Knicks (or other sports team) Yarmulka is a statement; a colorfully knitted Yarmulkah is a statement; a colored shirt is a statement. Just as you have a right to state your ideals etc through your cloths, so too, do I have a right to reject you fro those ideals.