The phrase "a wave of extremist" is not correct as it is missing a noun to complete the expression, such as "extremism" or "extremists." You can use it when discussing a sudden increase or surge in extremist behavior or ideology, but it needs to be properly structured.
Example: "The country is facing a wave of extremism that threatens social cohesion."
Alternatives: "a surge of extremism" or "an influx of extremists."
In the past two months she has debated an N.R.A. spokesman on live television and faced a wave of extremist trolls.
A previous phase lasted from the late 60s to the end of the 80s, another 20-odd-year period, and peaked with a wave of extremist activity between 1979 and 1981.
There will also be the question: why is France suffering a wave of extremist violence that is more intense – certainly more lethal – than any other seen in the west since the 9/11 attacks almost 15 years ago?
Ms. Bhutto had held together a large and diverse organization, and even if, on the back of public grief, it were to win the elections, it would be likely to be under great pressure to bring a semblance of stability to a nation racked by a wave of extremist violence.
At a pre-dinner press conference that was short on concrete policy measures and long on promises, Hollande stressed the need for improved security and intelligence-sharing to bolster Europe's defences against a wave of Islamic extremist violence.
The attack is a new blow to France, which saw a wave of Islamic extremist killings in 2015 and 2016.
Instead of weakening resolve, the lengthy conflict may have hardened solidarity among those who view the president as holding back a wave of Islamic extremists funded by Turkey, Arab states and the West.
It would be unreasonable to suggest that the Manchester and London attacks definitely foreshadow a new wave of extremist activity.
For the better part of the last decade, the SPLC has been following what it calls a "second wave" of extremist militia activity in America one not-so-secretly tied to "anger over the election of Barack Obama".
Despite this progress, Bangladesh has been experiencing a wave of violence by Islamic extremists since 2013.
But only recently, after a wave of deadly attacks by religious extremists inside the kingdom, has the Saudi establishment itself been roused to action.At a recent summit of the Gulf Co-operation Council, a body that links six oil-rich Arab monarchies, Saudi Arabia's rulers joined in a common pledge to reform religious education across the region.
