Well you won't get any criticism here, your reasons are valid and well thought out.
In this particular case, I have an additional reason for not counter protesting: I believe those Marxists are looking to engineer a confrontation that would be played up as violent racists attacking innocent immigrant women and children.
The black block and anarchist elements have previously used leftist demonstrations as cover for violent activity designed to provoke a police response that would fall on non violent lefties and discredit authorities as "brutal". Police have to be there, but we don't have to play into their hands.
These communists tried to entrap some of the Minutemen recently, but the excellent training and selection process (of Minutemen) put them wise to this tactic.
John and Ken vs Channel 11 news on KFI now!!
Great..