A lot of the "peace movements" of the past were financially and ideologically supported by the USSR and Russia [1].
There's nothing bad per se to say against pacifism, to the contrary - but the public image of pacifist movements these days has been heavily tarnished by both the obvious Russia-apologetism regarding the Ukraine war [2] and outright glorification of the horrors done by Hamas on Oct 7th.
[1] https://www.swr.de/swrkultur/wissen/wie-russische-einflussne...
[2] https://www.br.de/nachrichten/bayern/zuviel-verstaendnis-fue...