Why are the police unions so silent about a cop being murdered by trump supporters ?

Because active duty cops from around the country participated. Both Seattle and San Francisco identified cops who were in DC and are now under investigation. The Seattle police union chief is refusing comment, but he appeared, and gave speeches in Trump rallies before.

Also about the two cops that have suicided since Jan 6... :(

Probably because Trump supporters have a privilege. Maybe because this cop fighted against the "heroes" and "patriots" and so it was ok that he was murdered.

I bet if a Black person would have murdered this cop a wave of hate and racism would go through the country. But as I said: It seems Trump supporters have a privilege. 😒

I wonder 🤔

They are both on the right in general. If they have to sacrifice a few members in order to maintain solidarity they will.