Several of these studies are not from peer-reviewed sources. For example, “Combining Childhood Vaccines at One Visit Is Not Safe” is published by the Association of American Physicians and Surgeons however a quick google search quickly identifies this as a source that is not considered scientifically reputable and has a politically partisan approach.
I’m all for an open and honest conversation about vaccines and safety, but we have to be working from an intellectually honest and even playing field. Journals which are not scientifically accepted shouldn’t be used as evidence of scientific proof. There is a huge proliferation of disreputable journals these days, it’s very important to validate your sources. Many of these disreputable journals will publish anything for a fee while on the surface seeming legitimate.