Not equal to operator in Liquid - shopify

Question

I am facing a strange problem. As per shopify documentation, != is not equal to. However when I use it, the IDE is not recognizing it. Below is two screenshots. In one when I replace != with == the variable following the == gets highlighted. When I replace it with != the variable is not getting highlighted and the logic is failing too. How do I correct it.
The line I am referring in each image is if tag != 'sweets' or …:
Edited
{% if collection.all_tags.size > 0 %}
<div class="form-horizontal">
<label for="BrowseBy">{{ 'collections.sorting.city' | t }}</label>
{% comment %}Good for /collections/all collection and regular collections{% endcomment %}
{% if collection.handle %}
{% capture collection_url %}/collections/{{ collection.handle }}{% unless collection.sort_by == blank %}?sort_by={{ collection.sort_by }}{% endunless %}{% endcapture %}
{% comment %}Good for automatic type collections{% endcomment %}
{% elsif collection.current_type %}
{% assign collection_url = collection.current_type | url_for_type | sort_by: collection.sort_by %}
{% comment %}Good for automatic vendor collections{% endcomment %}
{% elsif collection.current_vendor %}
{% assign collection_url = collection.current_vendor | url_for_vendor | sort_by: collection.sort_by %}
{% endif %}
<select name="BrowseBy" id="BrowseBy" class="btn--tertiary">
<option value="{{ collection_url }}">{{ 'collections.sorting.all_tags' | t }}</option>
{% for tag in collection.all_tags %}
{% if tag == 'jamshedpur' or tag == 'ranchi' %}
{% capture new_url %}{{ tag | link_to_tag: tag | split: 'href="' | last | split: '"' | first }}{% endcapture %}
<option{% if current_tags contains tag %} selected{% endif %} value="{{ new_url }}">{{ tag }}</option>
{% endif %}
{% endfor %}
</select>
<label for="BrowseBy">{{ 'collections.sorting.category' | t }}</label>
<select name="BrowseBy" id="BrowseBy" class="btn--tertiary">
<option value="{{ collection_url }}">{{ 'collections.sorting.all_tags' | t }}</option>
{% for tag in collection.all_tags %}
{% if tag == 'sweets' or tag == 'cake' or tag == 'savories' %}
{% capture new_url %}{{ tag | link_to_tag: tag | split: 'href="' | last | split: '"' | first }}{% endcapture %}
<option{% if current_tags contains tag %} selected{% endif %} value="{{ new_url }}">{{ tag }}</option>
{% endif %}
{% endfor %}
</select>
<label for="BrowseBy">{{ 'collections.sorting.shop' | t }}</label>
<select name="BrowseBy" id="BrowseBy" class="btn--tertiary">
<option value="{{ collection_url }}">{{ 'collections.sorting.all_tags' | t }}</option>
{% for tag in collection.all_tags %}
{% if tag != 'sweets' or tag != 'cake' or tag != 'savories' or tag != 'jamshedpur' or tag != 'ranchi' %}
{% capture new_url %}{{ tag | link_to_tag: tag | split: 'href="' | last | split: '"' | first }}{% endcapture %}
<option{% if current_tags contains tag %} selected{% endif %} value="{{ new_url }}">{{ tag }}</option>
{% endif %}
{% endfor %}
</select>
</div>
{% endif %}
<script>
$(function() {
$('#BrowseBy')
.bind('change', function() {
location.href = jQuery(this).val();
}
);
});
</script>