Are left wingers really to be believed?

I saw two articles today. The first involved one of the women that accused Kavanaugh of raping her. She came out and admitted it was all made up and was just done to help the Dem cause. Then I saw a second article about a Dem rally that was canceled in NYC because the synagogue it was going to be held at was vandalized. The story was that they caught the vandal and it was a Dem activist who believed that committing a hate crime was the best way to highlight hate crimes by the right.
With behavior like this happening, how are we to take anything said or done by the left seriously?