Well your script works if you have a bot named X and a command on it that you message him to devoice nicknamehere there your script has no flaw except
has Dave said close your event.
Rule #1 if your gonna open a bracket (CLOSE IT) its like locking your front door of the house and leaving your backdoor unlocked, other things can come in "conflict"
theres a neat button in your Script Editor in mirc in the top right corner looks like {} if you press it and says bracket mismatch it means you didnt close your bracket "EVENT" properly.
your code should be more like this...
on *:text:*:#christian-chat:{
if (*showing*me*the*hatred*and fascism* iswm $strip($1-)) {
msg x devoice # $nick
}
[color:blue]}[/color]
