There is nothing radical in not supporting XT. Being on the fence as in "half adopting" XT is simply a disingenuous stance. Sort of like the "atheism is a religion" argument. Or being on the fence about the Pol Pot genocide because opposing all murders is radical, "let's compromise and murder just half of the opposition and their families".
Problem is, the public argument pretty quickly turned into a binary choice of sorts, pro XT vs. pro status quo. Given that choice, anything
other than being on the fence would be naive.
XT is a bit of a red herring. It's more about BIP101 (and friends) and more broadly, it's about how the protocol is managed.