Polish homophobia doesn’t require stimuli from abroad, we’re doing well on our own. When we decriminalised homosexual acts in 1932 it was already decriminalised in then-Bolshevik Russia so I wouldn’t look into historical context that much. If I had to blame any external factors it’d be turning Poland into ethnically homogenous country after WW2. Allies did a real number on us then.
That hasn’t been my experience as the gay son of a Polish man in Australia. My dad was hesitant in 2002 when I first came out, but he eventually got over it. It was when Putin started pushing rhetoric about extremist LGBTIQA+ people that my relationship with my dad took a turn for the dark. He’s obsessed with rainbow fascists and won’t hear a word of my side even though I’m the real human he knows. I ended up having to cut all contact with him, and I hold religious fundamentalist populists responsible.
Anti-LGBT propaganda in the mainstream has been mostly the doing of PiS affiliated media, Catholic Church and teenage edgelords. Say what you will about PiS, they are not pro-Russia, and their homophobia looks tame compared to what was happening in the 90s. While there is some external interference on the fringes, we can be shitty on our own.