Most of the time the word "Radical" has a negative association, kind of like fanatic and extremist, but I think we need to get past the negative pictures those words conjure up and realize Y'shua was a radical of his age and time.
Y'shua says that the greatest commandments are to love Elohim with all you have and secondly to love your neighbour as you do yourself.
And David danced as a wild man (fanatic) when the ark of Elohim was brought back to the temple, maybe what we need is fanatical joy knowing our redeemer lives and watches over us, maybe we do need radical love to love our neighbour, maybe extreme spiritual warfare is what is needed to push back the darkness and evil enveloping the world today.