Also — if you are organising an international conference and still plan for that to take place in the US, think again. You are putting your international audience at risk. Not just Trump critics, also transgender people, non-white people and more groups.
Do note that I still refuse to make all US people responsible for what their administration is doing. But I do ask them to do everything they can to stop this development towards splendid isolation and authoritarianism. For your own sake.
If you have a fediverse account, you can quote this note from your own instance. Search https://social.wildeboer.net/users/jwildeboer/statuses/115774159058734706 on your instance and quote it. (Note that quoting is not supported in Mastodon.)