Straus, a master tailor
Again, what evidence do you have for saying Straus was a tailor?
designed and stitched the famous Confederate Flag, aka the "Stars & Bars."
Where does this information come from?
his lawyers got the patent transferred to the regular USA patent office in 1866.
The U.S. Copyright Office (not Patent Bureau) provided protection for the design of the Confederate flag? Really?
He used these lucrative royalties to found the Macy's chain of department stores
He didn't found Macy's; R. H. Macy did. The Straus family acquired the store after Macy died. And it wasn't a chain in 1912, just a single store at Herald Square.
where he personally designed the store's entire male clothing line
Where does this come from? Contemporary accounts describe him more as the "back office guy."
including the White Star Line's officers uniforms
Again, what's the source for this statement?
As such, his trip on the Titanic was free.
According to the available ticketing information he paid £221 15s 7d for himself, Mrs. Straus and Ms. Bird.
He even had some new sample uniforms with him
Source, please?
many more of them likely would've survived as they were/are water repellent.
They died from being cold, not wet.