Exactly! The reasons you are criticized are:
1. You are not consistent. If you are against war, then you are against war. You are not against "Republican" wars and for "Democrat" wars.
2. Some of the filth coming out of the mouths of anti-war demonstrators are obviously political, not deep seated personal beliefs. Things like "Bush is the worst terrorist in the world" and "Bush: The new Hitler".
3. Like it or not, you are defending a man that must be removed simply for his human rights violations. He has massacred hundreds of thousands of people, women are routinely brutalized, raped and killed in front of family members, thousands are imprisoned on whims. Yes, this is what you are defending.
Again, the transparency of your motives are to easy to see. You (the left) said nothing during the Clinton bombing of the Sudan, the Clinton bombing of Afghanistan, the Clinton bombing of Irag (400 cruise missiles), the Clinton bombing of Bosnia (for 70 straight days!). No worry about civilian casualties when it is a Democrat!
No surprise that Americans are taking offense.