I've wondered the same thing myself many times. Near as I can tell, what's different now is the LGBTQ+ agenda. This seems to be the straw that broke the camel's back in many people's minds. What I've heard a lot of people say is that sodomy is what brought God's judgment on Sodom and Gomorrah, and it will be what brings judgment on the US.
But what happened to Sodom and Gomorrah isn't that simple. There are a lot of reasons given in God's word for why they were destroyed, ranging from pride, gluttony, laziness and no compassion for the poor (Ezekiel 16:49). Sexual immorality was certainly part of it, including rape; but it wasn't the only thing. All these things have been going on in the US for a long time so why hasn't God brought down judgment yet? I have no idea. All I know is that when people or nations have filled their cup of sins to the brim, then it's time; and only God knows when that time is.
Seems to me, the thing that has really sent people into a tizzy, is the fact that so much LGBTQ+ stuff is becoming accepted by the mainstream and children are now being influenced. That's not good, but I don't believe in being reactionary; I believing in looking for constructive solutions. And one of the most constructive I can think of is showing people compassion and teaching them the good news.