Why doesn't bootstrap work in ie8?

Question

css

masterprava.com
added the respond.js and html5.js connection as indicated in the instructions

<meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <!--[if lt IE 9]>
      <script src="https://oss.maxcdn.com/html5shiv/3.7.2/html5shiv.min.js"></script>
      <script src="https://oss.maxcdn.com/respond/1.4.2/respond.min.js"></script>
    <![endif]-->

I tried to add before the closing head, after the styles, before the styles, before and after bootstrap.js connection, including local files - it doesn't help.
Are there any other options?