Being pulled over is fun.

I am totally pissed and just need to vent right now. So this morning I worked at 9 am, I woke up early having a relaxed morning taking it slow. I was going to leave my house early cause I wanted to pick up some breakfast before work. So I drove down to a shopping center, I saw a cop on the corner of my eye but made nothing of it. I look in my mirror and see him following me. I had to cross over two lanes to get to the shopping center, I did nothing illegal with my driving. Right before I pull into the shopping center the bastard pulls me over. Walks over asks me for license and reg I give it to him. Asks me if I have weed in the car, I say no. Asks me if there is any weapons I say yes there is a knife in the backseat. Tells me to step outside the vehicle. I do, he said he didn't want me to stab him I just laugh inside. I sat on the curb and he asks me again if there is weed or a pipe in the car. Again I say no. Ask me a shitload of questions like were I was going, have I been arrested, or a ticket, or if there was weed in my car. I just say no (expect for the ticket) Finally lets me go. OMG I was sooo pissed I just don't understand. I can tell you at least 5 people on my way driving to work that deserve a ticket or even being pulled over more than I did. It just doesn't seem fair. I don't feel safe with cops and isnt that their job to keep us safe?