Wrong on both accounts. A true Christian wouldn't do what he did and by most accounts, he was an occultist if anything. Also, the swastika pre dates the Christian religion by many, many years.
Hitler claimed to be a Christian just like the current members of the over 1000 Christian Churches that exist today. Are Episcopalians no longer Christians because their Church allows homosexuals?
Hitler's introduction to the swastika was at his Church in Austria. It has been a Christian symbol for centuries. The Curch that Hitler attended as a child in Austria still exists and the swastika is still there.