I've been an outdoorsman for a long time, it used to be that the rare times you met other people on the trails, they were mostly locals, and generally kind and polite, almost like Canadians where both sides were profusely apologizing for even mildly inconveniencing the other party.
With all the transplants flooding the state in the last couple of years, that politeness has evaporated, my wife has been flipped off on the road to the trail when both cars had to pass on a tight single lane road, I got sworn at because I didn't let an individual use the porta potty first at a trailhead (I had gotten to it first and didn't realize they wanted to cut in front of me).
My child has been run off the trail twice now, and sworn at, as has his friend who is only a year older, they are both in elementary school, and this child, now 9, at 7 years old, was another time lectured for not moving off the side of the trail fast enough and being "in the way" of a trail user going uphill who I believe was trying to get some sort of KOM on Strava. They thought he was part of a church group as there was a YM group also there that we were not with, and they told him, "your church leaders are bad leaders because they didn't teach you to get out of the way," luckily for them and myself, I was about 50 yards ahead of them, and wasn't close enough to confront them otherwise that could have turned ugly.
I've never seen it like this until the last couple years, the trails are more crowded than they've ever been in my entire life, and some of the new users, are sorely lacking in etiquette.
Frankly, it's unacceptable. Transplants, please go home, and take your bad attitudes back to whatever backwards state you just came from.