@income_magician_28 In principle, in addition to excluded business models (armaments, tobacco, drugs & Co.), there is also a ban on interest rates. The latter is unavoidable on the stock market nowadays. There one helps oneself at least with it to set up a tolerance limit for these, in order to still take the best. Interest income is diverted from the some investment by donations. In the case of 3M, it is an excessive amount of interest-bearing debt.
@income_magician_28 Nothing absolute, but related to the market cap. It's simply a matter of the proportion of borrowed capital, regardless of how much interest is paid on it. Taking and giving interest is not actually permitted per se. There is only a tolerance here, taking into account the current framework conditions. If you are interested in the topic in more detail, here is something more detailed: https://halal-investieren.de/grund-der-30-grenze-im-financial-screening/