How to make a trigger not run based on a static variable

CaseTrigger.java

//This would actually be your CaseTrigger.trigger but the hilighting wouldn't work then

List<ChatterPost> postsToInsert = new List<ChatterPost>();

for (Case c: trigger.new) {
    if (c.Status == 'collab') {
        postsToInsert.add(new ChatterPost(...));
}

if (!postsToInsert.isEmpty()) {
    GenericUtils.UPDATE_CASE_VIA_CHATTER_POST = false;
    insert postsToInsert;
    
    for (ChatterPost post: postsToInsert) {
        //Logic to copy chatterPost.Id to Case
    }
}

ChatterPostTrigger.java

if (!GenericUtils.UPDATE_CASE_VIA_CHATTER_POST) {
    return;
}

//Trigger logic

GenericUtils.java

public static Boolean UPDATE_CASE_VIA_CHATTER_POST = true;