He's made it clear he holds a deep seeded hatred for Russia and Russian people/culture. I actually appreciate that he has done so as it makes further attempts at discussion demonstrably pointless.
It's insane to label Tulsi Gabbard as somehow a "Putin sympathizer" based on anything she has said or done imho. Even if one perceives Russia as some sort of global threat to American interests (which doesn't make much sense as they struggle to project military power and are basically a very small economy compared to the 'great powers'), from a policy perspective it makes sense to at least maintain a healthy relationship with them as a significant nuclear power. The path to
unwinding the proxy war seems pretty clear, overall.
Warmongers (including veterans such as Duckworth) who label her this are really doing a disservice to the country.
Oh, and she's a "Hindutva Nationalist" apparently, to boot!