Usually it is a good thing to have a new member or competitor in the area, which is new for customers. That increases the total volume of the area and also the customers will have more alternatives. That "concept" is from more common products like cars, consumer electronics, ... why couldn't that work with currencies, too.
In general people dislike whatever they don't understand and haven't taken the time to investigate.
Tiring, but true.
I give it a few months and then a lot of people who now are against it will pretend to have loved it all along.