The first amendment is actually far more strongly defended than the second. It's settled law at this point that exceptions to the first amendment must pass strict scrutiny, which means that there must be a compelling government interest in play, the restriction must be narrowly tailored to protect just that interest, and the restriction must be the least restrictive way possible to protect that interest. In practice, few laws pass strict scrutiny. In contrast, courts are still hashing out which level of scrutiny must be used when deciding second amendment cases.