Schindler joined the Terriers from 1860 Munich in 2016 but still follows the results of his hometown club, whom he captained prior to the then club-record transfer.
And the 27-year-old admits the pain he felt when his former club dropped out of the German second division prevented him from fully enjoying the moment his penalty took Huddersfield up to the Premier League at the play-off final last May.
"I could not be happy at Huddersfield's big open-top bus celebration because that's the day my old club 1860 went down. It was an unreal feeling, but sadness and disappointment outweighed it - I was in contact with many boys in the team and it made me feel incredibly sorry."
Schindler, who extended his contract with Town through to 2020 last summer, admits he does not know many of the current 1860 players that well but is delighted former teammate Daniel Bierofka is doing so well in his first senior coaching position.
"I'm thrilled with Biero," he added in an interview with Sporx.
"He's a great character who has shaped me and helped me a lot during my career, not only as a coach but also as a friend.
"Because of Biero I can not afford not to be interested in what happens at the club, I try to watch every match."
And while a return to 1860, who are now playing regional football outside the top three divisions in Germany, is not a realistic prospect right now, Schindler said "in principle, of course, 1860 is still my heart's club."
He admitted his family continued to be "rooted in Munich" and he and his wife had days "when we long for more closeness".