Yeah so you'll generally find lemmy users to be quite hostile to your political position. I'm grown up enough not to be "hostile" but to be frank I think your voting choices are very poorly considered.
To your broader question. Lemmy is just like any other platform. If you say silly things people will rebut you. There is no respect for contrary opinions.
I've found that lemmy communities tend to be very homogeneous and in many threads if you offer any insights which are not breathless support you'll be heavily downvoted and get vitriolic responses, or banned.
For example, saying anything critical of China in a .ml thread will result in a ban.